docs: remove variables that we define in the snippet from common

This is syncing our Makefile.am with upstream gtkdoc.

diff --git a/docs/plugins/Makefile.am b/docs/plugins/Makefile.am
index 728574f..4e8ab0f 100644 (file)
--- a/docs/plugins/Makefile.am
+++ b/docs/plugins/Makefile.am
@@ -233,9 +233,6 @@ extra_files =
 GTKDOC_CFLAGS = $(GST_BASE_CFLAGS) -I$(top_builddir)
 GTKDOC_LIBS = $(GST_BASE_LIBS)
 
-GTKDOC_CC=$(LIBTOOL) --tag=CC --mode=compile $(CC)
-GTKDOC_LD=$(LIBTOOL) --tag=CC --mode=link $(CC)
-
 # If you need to override some of the declarations, place them in this file
 # and uncomment this line.
 #DOC_OVERRIDES = $(DOC_MODULE)-overrides.txt