Userland: Undefine FOR_EACH_TOKEN_TYPE everywhere

This was causing some macro redefinition errors after the headers ended
up in the same file through some includes. The simple fix is to undefine
the macro after use.

Userland/Libraries/LibCpp/Token.h

@@ -135,3 +135,5 @@ private:
 };
 
 }
+
+#undef FOR_EACH_TOKEN_TYPE

Userland/Libraries/LibGUI/GML/Lexer.h

@@ -67,3 +67,5 @@ private:
 };
 
 }
+
+#undef FOR_EACH_TOKEN_TYPE

Userland/Libraries/LibGUI/GitCommitLexer.h

@@ -60,3 +60,5 @@ private:
 };
 
 }
+
+#undef FOR_EACH_TOKEN_TYPE

Userland/Libraries/LibGUI/INILexer.h

@@ -66,3 +66,5 @@ private:
 };
 
 }
+
+#undef FOR_EACH_TOKEN_TYPE