Kill duplicate pc/evas-drm.pc install entry

--- efl-1.10.0/Makefile.am.orig	2014-06-07 14:09:28.094432996 +0200
+++ efl-1.10.0/Makefile.am	2014-06-07 15:18:31.154346640 +0200
@@ -204,10 +204,6 @@
 pkgconfig_DATA += pc/evas-wayland-egl.pc
 endif
 
-if BUILD_ENGINE_DRM
-pkgconfig_DATA += pc/evas-drm.pc
-endif
-
 if HAVE_ECORE_COCOA
 pkgconfig_DATA += pc/ecore-cocoa.pc
 endif