BuildFeatures: Remove curl buildfeature.

No longer used.

Change-Id: I3a97e18e76da0995f9ab8599b796144c5bc0452c
Reviewed-on: https://review.haiku-os.org/606
Reviewed-by: waddlesplash <waddlesplash@gmail.com>

ReadMe.Compiling.md

@@ -42,7 +42,6 @@ Whether they are installed can be tested by running them in a shell with
 the `--version` parameter.
 
 The following libraries (and their respective headers) are required:
- * `curl`
  * `zlib`
 
 ### Haiku for ARM

build/jam/BuildFeatures

@@ -115,24 +115,6 @@ if [ IsPackageAvailable icu_devel ] {
 }
 
 
-# curl
-if [ IsPackageAvailable curl_devel ] {
-	ExtractBuildFeatureArchives curl :
-		file: base curl
-			runtime: lib
-		file: devel curl_devel
-			depends: base
-			library:
-				$(developLibDir)/libcurl.so
-			headers: $(developHeadersDir) $(developHeadersDir)/curl
-		;
-
-	EnableBuildFeatures curl ;
-} else {
-	Echo "Curl not available for $(TARGET_PACKAGING_ARCH)" ;
-}
-
-
 # CLucene
 
 # TODO: Update to packages!