Enable the -Wextra-semi warning

libsolidity/analysis/ControlFlowGraph.h

@@ -76,7 +76,7 @@ public:
 	}
 
 	VariableDeclaration const& declaration() const { return m_declaration; }
-	Kind kind() const { return m_occurrenceKind; };
+	Kind kind() const { return m_occurrenceKind; }
 	std::optional<langutil::SourceLocation> const& occurrence() const { return m_occurrence; }
 private:
 	/// Declaration of the occurring variable.

libsolidity/codegen/ir/IRGenerationContext.h

@@ -135,7 +135,7 @@ public:
 	/// @returns a new copy of the utility function generator (but using the same function set).
 	YulUtilFunctions utils();
 
-	langutil::EVMVersion evmVersion() const { return m_evmVersion; };
+	langutil::EVMVersion evmVersion() const { return m_evmVersion; }
 
 	ABIFunctions abiFunctions();