lineage: Remove no longer used commented repositories

* There has been no indication since lineage-15.0 bringup
  that these repositories are coming back, so remove them

Change-Id: I2026e35d4b60d1ea2430d1df651fcc45bbf1deb8
diff --git a/snippets/lineage.xml b/snippets/lineage.xml
index 3ca5d9f..d66da0b 100644
--- a/snippets/lineage.xml
+++ b/snippets/lineage.xml
@@ -6,7 +6,6 @@
   <project path="device/lineage/sepolicy" name="LineageOS/android_device_lineage_sepolicy" />
   <project path="external/bash" name="LineageOS/android_external_bash" />
   <project path="external/exfat" name="LineageOS/android_external_exfat" />
-  <!--<project path="external/ffmpeg" name="LineageOS/android_external_ffmpeg" />-->
   <project path="external/fuse" name="LineageOS/android_external_fuse" />
   <project path="external/htop" name="LineageOS/android_external_htop" />
   <project path="external/libncurses" name="LineageOS/android_external_libncurses" />
@@ -20,10 +19,8 @@
   <project path="external/p7zip" name="LineageOS/android_external_p7zip" />
   <project path="external/pigz" name="LineageOS/android_external_pigz" />
   <project path="external/rsync" name="LineageOS/android_external_rsync" />
-  <!--<project path="external/stagefright-plugins" name="LineageOS/android_external_stagefright-plugins" />-->
   <project path="external/unrar" name="LineageOS/android_external_unrar" />
   <project path="external/vim" name="LineageOS/android_external_vim" />
-  <!--<project path="external/yaffs2" name="LineageOS/android_external_yaffs2" />-->
   <project path="external/zip" name="LineageOS/android_external_zip" />
   <project path="hardware/lineage/interfaces" name="LineageOS/android_hardware_lineage_interfaces" >
     <copyfile dest="hardware/lineage/Android.bp" src="Android.bp"/>
@@ -53,7 +50,6 @@
   <project path="packages/apps/Trebuchet" name="LineageOS/android_packages_apps_Trebuchet" />
   <project path="packages/apps/Updater" name="LineageOS/android_packages_apps_Updater" />
   <project path="packages/overlays/Lineage" name="LineageOS/android_packages_overlays_Lineage" />
-  <!--<project path="packages/providers/DataUsageProvider" name="LineageOS/android_packages_providers_DataUsageProvider" />-->
   <project path="packages/providers/WeatherProvider" name="LineageOS/android_packages_providers_WeatherProvider" />
   <project path="prebuilts/lineage-sdk" name="LineageOS/android_prebuilts_lineage-sdk" clone-depth="1" />
   <project path="system/extras/su" name="LineageOS/android_system_extras_su" />