unix: some using cleanups.

basis/unix/process/process.factor

@@ -1,7 +1,5 @@
-USING: kernel alien.c-types alien.data alien.strings sequences
-math alien.syntax unix namespaces continuations threads assocs
-io.backend.unix io.encodings.utf8 libc unix.types unix.utilities
-fry unix.ffi ;
+USING: alien.c-types alien.data alien.syntax io.encodings.utf8
+kernel libc math sequences unix unix.types unix.utilities ;
 IN: unix.process
 
 ! Low-level Unix process launching utilities. These are used
@@ -28,13 +26,13 @@ FUNCTION: int execve ( c-string path, c-string* argv, c-string* envp ) ;
     [ utf8 strings>alien ] tri* execve ;
 
 : exec-args ( seq -- int )
-    [ first ] [ ] bi exec ;
+    [ first ] keep exec ;
 
 : exec-args-with-path ( seq -- int )
-    [ first ] [ ] bi exec-with-path ;
+    [ first ] keep exec-with-path ;
 
 : exec-args-with-env  ( seq seq -- int )
-    [ [ first ] [ ] bi ] dip exec-with-env ;
+    [ [ first ] keep ] dip exec-with-env ;
 
 : with-fork ( child parent -- )
     [ fork-process ] 2dip if-zero ; inline

basis/unix/stat/macosx/macosx.factor

@@ -1,5 +1,5 @@
-USING: alien.c-types arrays accessors combinators classes.struct
-alien.syntax unix.time unix.types unix.ffi ;
+USING: alien.c-types alien.syntax classes.struct unix.time
+unix.types ;
 IN: unix.stat
 
 ! Mac OS X

basis/unix/statfs/macosx/macosx.factor

@@ -1,9 +1,7 @@
 ! Copyright (C) 2008 Doug Coleman.
 ! See http://factorcode.org/license.txt for BSD license.
-USING: alien.c-types io.encodings.utf8 io.encodings.string
-kernel sequences unix.stat accessors unix combinators math
-grouping system alien.strings math.bitwise alien.syntax
-unix.types classes.struct unix.ffi literals ;
+USING: alien.c-types alien.syntax classes.struct literals
+unix.ffi unix.types ;
 IN: unix.statfs.macosx
 
 CONSTANT: MNT_RDONLY  0x00000001

extra/curl/ffi/ffi.factor

@@ -1,6 +1,6 @@
 USING: alien alien.c-types alien.enums alien.libraries
 alien.syntax classes.struct combinators kernel math
-system unix.types words ;
+system words ;
 
 IN: curl.ffi
 

extra/forestdb/ffi/ffi.factor

@@ -1,8 +1,7 @@
 ! Copyright (C) 2014 Doug Coleman.
 ! See http://factorcode.org/license.txt for BSD license.
 USING: alien alien.c-types alien.libraries
-alien.libraries.finder alien.syntax classes.struct kernel
-unix.types ;
+alien.libraries.finder alien.syntax classes.struct kernel ;
 IN: forestdb.ffi
 
 ! Functions with LIBFDB_API are exported.