pidgin/pidgin

remove the unused gtkinternal.h

2020-08-08, Gary Kramlich
af35bc5fc875
remove the unused gtkinternal.h

Remove gtkinternal.h as it is not actually used

Testing Done:
Compile only.

Reviewed at https://reviews.imfreedom.org/r/63/
syntax: glob
.*.swp
.DS_Store
*.pyc
*~
\#*\#
subprojects/*/
syntax: regexp
^build(.+)?\/
win32-install-dir(\.release)?