gpp.rake in revealing-1.0.5

- old
+ new

@@ -1,6 +1,4 @@
-prereq 'gpp'
-
 desc "Sources are pre-processed into the single #{GPP_FILE}"
-file GPP_FILE => ['gpp', GPP_DIR, DIRTY_FILE] + SOURCE_FILES do |target|
+file GPP_FILE => [GPP_DIR, DIRTY_FILE] + SOURCE_FILES do |target|
   sh %(gpp -I src -x -o #{target} #{SOURCE_DIR}/index.markdown)
 end