FS-8867: build using in tree libvpx, vpx no longer optional and does not use system libvpx due to issues with having to update it frequently conflicting with system libraries, now we link to the static in tree version instead. Also, mod_vpx is now a core module instead of a loadable module, so mod_vpx.so will no longer be built

src/mod/codecs/mod_openh264/Makefile.am

@@ -1,8 +1,6 @@
 include $(top_srcdir)/build/modmake.rulesam
 MODNAME=mod_openh264
 
-if HAVE_VPX
-
 OPENH264_DIR=/usr/local/
 
 mod_LTLIBRARIES = mod_openh264.la
@@ -10,10 +8,3 @@ mod_openh264_la_SOURCES  = mod_openh264.cpp
 mod_openh264_la_CXXFLAGS   = $(AM_CXXFLAGS) -I$(OPENH264_DIR)/include/wels
 mod_openh264_la_LIBADD   = $(switch_builddir)/libfreeswitch.la
 mod_openh264_la_LDFLAGS  = -L$(OPENH264_DIR)/lib/ -lopenh264 -avoid-version -module -no-undefined -shared
-
-else
-install: error
-all: error
-error:
-	$(error You must install libvpx2-dev to build mod_openh264)
-endif