Changed categories used for pro file highlighting

Now reuses the colors set for Type and Keyword for the variables and
functions respectively. Having the categories Variable and Function in
the fonts and color settings was confusing.

src/plugins/texteditor/texteditorconstants.h

@@ -91,9 +91,6 @@ const char * const C_REMOVED_LINE        = "RemovedLine";
 const char * const C_DIFF_FILE           = "DiffFile";
 const char * const C_DIFF_LOCATION       = "DiffLocation";
 
-const char * const C_VARIABLE            = "Variable";
-const char * const C_FUNCTION            = "Function";
-
 } // namespace Constants
 } // namespace TextEditor