Remove USE-IF: again

core/syntax/syntax-docs.factor

@@ -363,12 +363,6 @@ HELP: USE:
 { $description "Adds a new vocabulary at the front of the search path. Subsequent word lookups by the parser will search this vocabulary first." }
 { $errors "Throws an error if the vocabulary does not exist." } ;
 
-HELP: USE-IF:
-{ $syntax "USE-IF: word vocabulary" }
-{ $values { "word" "a word with stack effect " { $snippet "( -- ? )" } } { "vocabulary" "a vocabulary name" } }
-{ $description "Adds " { $snippet "vocabulary" } " at the front of the search path if " { $snippet "word" } " evaluates to a true value." }
-{ $errors "Throws an error if the vocabulary does not exist." } ;
-
 HELP: USING:
 { $syntax "USING: vocabularies... ;" }
 { $values { "vocabularies" "a list of vocabulary names" } }

core/syntax/syntax.factor

@@ -46,7 +46,6 @@ IN: bootstrap.syntax
     ] define-syntax
 
     "USE:" [ scan use+ ] define-syntax
-    "USE-IF:" [ scan-word execute scan swap [ use+ ] [ drop ] if ] define-syntax
 
     "USING:" [ ";" parse-tokens add-use ] define-syntax
 

extra/opengl/gl/gl.factor

@@ -3,9 +3,8 @@
 
 ! This file is based on the gl.h that comes with xorg-x11 6.8.2
 
-USING: alien alien.syntax kernel sequences system words ;
-USE-IF: windows? opengl.gl.windows
-USE-IF: unix? opengl.gl.unix
+USING: alien alien.syntax kernel parser sequences system words ;
+<< windows? "opengl.gl.windows" "opengl.gl.unix" ? use+ >>
 
 IN: opengl.gl