diff --git a/libdevcore/JSON.cpp b/libdevcore/JSON.cpp
index 80c116bbe..5d1ea831d 100644
--- a/libdevcore/JSON.cpp
+++ b/libdevcore/JSON.cpp
@@ -111,16 +111,4 @@ bool jsonParseStrict(string const& _input, Json::Value& _json, string* _errs /*
 	return parse(readerBuilder, _input, _json, _errs);
 }
 
-bool jsonParse(string const& _input, Json::Value& _json, string *_errs /* = nullptr */)
-{
-	static Json::CharReaderBuilder readerBuilder;
-	return parse(readerBuilder, _input, _json, _errs);
-}
-
-bool jsonParseFile(string const& _fileName, Json::Value& _json, string *_errs /* = nullptr */)
-{
-	return jsonParse(readFileAsString(_fileName), _json, _errs);
-}
-
-
 } // namespace dev
diff --git a/libdevcore/JSON.h b/libdevcore/JSON.h
index ecb934673..2390d55f2 100644
--- a/libdevcore/JSON.h
+++ b/libdevcore/JSON.h
@@ -41,18 +41,4 @@ std::string jsonCompactPrint(Json::Value const& _input);
 /// \return \c true if the document was successfully parsed, \c false if an error occurred.
 bool jsonParseStrict(std::string const& _input, Json::Value& _json, std::string* _errs = nullptr);
 
-/// Parse a JSON string (@a _input) and writes resulting JSON object to (@a _json)
-/// \param _input JSON input string
-/// \param _json [out] resulting JSON object
-/// \param _errs [out] Formatted error messages
-/// \return \c true if the document was successfully parsed, \c false if an error occurred.
-bool jsonParse(std::string const& _input, Json::Value& _json, std::string* _errs = nullptr);
-
-/// Parse a JSON string (@a _input) and writes resulting JSON object to (@a _json)
-/// \param _input file containing JSON input
-/// \param _json [out] resulting JSON object
-/// \param _errs [out] Formatted error messages
-/// \return \c true if the document was successfully parsed, \c false if an error occurred.
-bool jsonParseFile(std::string const& _fileName, Json::Value& _json, std::string* _errs = nullptr);
-
 }
diff --git a/libyul/AsmAnalysisInfo.h b/libyul/AsmAnalysisInfo.h
index 08a35ade0..1201399a2 100644
--- a/libyul/AsmAnalysisInfo.h
+++ b/libyul/AsmAnalysisInfo.h
@@ -22,8 +22,6 @@
 
 #include <libyul/AsmDataForward.h>
 
-#include <boost/variant.hpp>
-
 #include <map>
 #include <memory>
 #include <vector>
diff --git a/test/libdevcore/JSON.cpp b/test/libdevcore/JSON.cpp
index a3e081be6..684fd92b2 100644
--- a/test/libdevcore/JSON.cpp
+++ b/test/libdevcore/JSON.cpp
@@ -69,47 +69,6 @@ BOOST_AUTO_TEST_CASE(json_compact_print)
 	BOOST_CHECK("{\"1\":1,\"2\":\"2\",\"3\":{\"3.1\":\"3.1\",\"3.2\":2}}" == jsonCompactPrint(json));
 }
 
-BOOST_AUTO_TEST_CASE(parse_json_not_strict)
-{
-	Json::Value json;
-	std::string errors;
-
-	// just parse a valid json input
-	BOOST_CHECK(jsonParse("{\"1\":1,\"2\":\"2\",\"3\":{\"3.1\":\"3.1\",\"3.2\":2}}", json, &errors));
-	BOOST_CHECK(json["1"] == 1);
-	BOOST_CHECK(json["2"] == "2");
-	BOOST_CHECK(json["3"]["3.1"] == "3.1");
-	BOOST_CHECK(json["3"]["3.2"] == 2);
-
-	// trailing garbage is allowed here
-	BOOST_CHECK(jsonParse("{\"1\":2,\"2\":\"2\",\"3\":{\"3.1\":\"3.1\",\"3.2\":3}}}}}}}}}}", json, &errors));
-	BOOST_CHECK(json["1"] == 2);
-	BOOST_CHECK(json["2"] == "2");
-	BOOST_CHECK(json["3"]["3.1"] == "3.1");
-	BOOST_CHECK(json["3"]["3.2"] == 3);
-
-	// comments are allowed
-	BOOST_CHECK(jsonParse(
-		"{\"1\":3, // awesome comment\n\"2\":\"2\",\"3\":{\"3.1\":\"3.1\",\"3.2\":4}}", json, &errors
-	));
-	BOOST_CHECK(json["1"] == 3);
-	BOOST_CHECK(json["2"] == "2");
-	BOOST_CHECK(json["3"]["3.1"] == "3.1");
-	BOOST_CHECK(json["3"]["3.2"] == 4);
-
-	// root element other than object or array is allowed
-	BOOST_CHECK(jsonParse("[]", json, &errors));
-	BOOST_CHECK(jsonParse("{}", json, &errors));
-	BOOST_CHECK(jsonParse("1", json, &errors));
-	BOOST_CHECK(json == 1);
-	BOOST_CHECK(jsonParse("\"hello\"", json, &errors));
-	BOOST_CHECK(json == "hello");
-
-	// non-UTF-8 escapes allowed
-	BOOST_CHECK(jsonParse("[ \"\x80\xec\x80\" ]", json, &errors));
-	BOOST_CHECK(json[0] == "\x80\xec\x80");
-}
-
 BOOST_AUTO_TEST_CASE(parse_json_strict)
 {
 	Json::Value json;
diff --git a/test/libsolidity/Metadata.cpp b/test/libsolidity/Metadata.cpp
index 2526dd8b6..f0af8b544 100644
--- a/test/libsolidity/Metadata.cpp
+++ b/test/libsolidity/Metadata.cpp
@@ -215,7 +215,7 @@ BOOST_AUTO_TEST_CASE(metadata_useLiteralContent)
 		BOOST_REQUIRE_MESSAGE(compilerStack.compile(), "Compiling contract failed");
 		string metadata_str = compilerStack.metadata("test");
 		Json::Value metadata;
-		jsonParse(metadata_str, metadata);
+		jsonParseStrict(metadata_str, metadata);
 		BOOST_CHECK(dev::test::isValidMetadata(metadata_str));
 		BOOST_CHECK(metadata.isMember("settings"));
 		if (_literal)
diff --git a/test/libsolidity/SMTCheckerJSONTest.cpp b/test/libsolidity/SMTCheckerJSONTest.cpp
index a2ce4e26b..19bdcaacc 100644
--- a/test/libsolidity/SMTCheckerJSONTest.cpp
+++ b/test/libsolidity/SMTCheckerJSONTest.cpp
@@ -18,6 +18,7 @@
 #include <test/libsolidity/SMTCheckerJSONTest.h>
 #include <test/Options.h>
 #include <libsolidity/interface/StandardCompiler.h>
+#include <libdevcore/CommonIO.h>
 #include <libdevcore/JSON.h>
 #include <boost/algorithm/string.hpp>
 #include <boost/algorithm/string/join.hpp>
@@ -43,7 +44,7 @@ SMTCheckerTest::SMTCheckerTest(string const& _filename, langutil::EVMVersion _ev
 
 	string jsonFilename = _filename.substr(0, _filename.size() - 4) + ".json";
 	if (
-		!jsonParseFile(jsonFilename, m_smtResponses) ||
+		!jsonParseStrict(readFileAsString(jsonFilename), m_smtResponses) ||
 		!m_smtResponses.isObject()
 	)
 		BOOST_THROW_EXCEPTION(runtime_error("Invalid JSON file."));
@@ -158,7 +159,7 @@ Json::Value SMTCheckerTest::buildJson(string const& _extra)
 	sources += "}";
 	string input = "{" + language + ", " + sources + "}";
 	Json::Value source;
-	if (!jsonParse(input, source))
+	if (!jsonParseStrict(input, source))
 		BOOST_THROW_EXCEPTION(runtime_error("Could not build JSON from string: " + input));
 	return source;
 }