facebook: remove the featute from the code base

Remove from:
- unit tests
- desktop widgets
- preferences
- core intergration
- cmakefiles
- build scripts
- icons
- docs

Also remove the plugins and social network integration.

Signed-off-by: Lubomir I. Ivanov <neolit123@gmail.com>

scripts/build.sh

@@ -392,9 +392,9 @@ fi
 cd $SRC
 
 if [ "$BUILD_WITH_WEBKIT" = "1" ]; then
-	EXTRA_OPTS="-DNO_USERMANUAL=OFF -DFBSUPPORT=ON"
+	EXTRA_OPTS="-DNO_USERMANUAL=OFF"
 else
-	EXTRA_OPTS="-DNO_USERMANUAL=ON -DFBSUPPORT=OFF"
+	EXTRA_OPTS="-DNO_USERMANUAL=ON"
 fi
 
 if [ "$BUILDGRANTLEE" = "1" ] ; then

scripts/smtk2ssrf-build.sh

@@ -141,7 +141,6 @@ fi
 
 cmake   -DBTSUPPORT=OFF \
 	-DCMAKE_BUILD_TYPE="$RELEASE" \
-	-DFBSUPPORT=OFF \
 	-DFORCE_LIBSSH=OFF \
 	-DFTDISUPPORT=OFF \
 	-DMAKE_TESTS=OFF \