Improves assembly and adds more tests.

libsolidity/ast/Types.cpp

@@ -1702,7 +1702,7 @@ MemberList::MemberMap ArrayType::nativeMembers(ContractDefinition const*) const
 				TypePointers{},
 				strings{string()},
 				strings{string()},
-				isByteArray() ? FunctionType::Kind::ByteArrayPop : FunctionType::Kind::ArrayPop
+				FunctionType::Kind::ArrayPop
 			)});
 		}
 	}

libsolidity/ast/Types.h

@@ -916,7 +916,6 @@ public:
 		ArrayPush, ///< .push() to a dynamically sized array in storage
 		ArrayPop, ///< .pop() from a dynamically sized array in storage
 		ByteArrayPush, ///< .push() to a dynamically sized byte array in storage
-		ByteArrayPop, ///< .pop() from a dynamically sized byte array in storage
 		ObjectCreation, ///< array creation using new
 		Assert, ///< assert()
 		Require, ///< require()