Remove speex from the pathmap

libspeexresampler uses LOCAL_EXPORT_C_INCLUDE_DIRS to export this path
to all of its users already.

Test: m libaudiopreprocessing libaudioutils
Change-Id: I682303142840d6f0f02c990de8e713620840bbda
diff --git a/core/pathmap.mk b/core/pathmap.mk
index 9b5a7db..13b3fe4 100644
--- a/core/pathmap.mk
+++ b/core/pathmap.mk
@@ -49,8 +49,7 @@
     audio-route:system/media/audio_route/include \
     wilhelm:frameworks/wilhelm/include \
     wilhelm-ut:frameworks/wilhelm/src/ut \
-    mediandk:frameworks/av/media/ndk/ \
-    speex:external/speex/include
+    mediandk:frameworks/av/media/ndk/
 
 #
 # Returns the path to the requested module's include directory,