bootstrap.image.upload: scp is included with windows git now.

pscp is not necessary anymore and in fact is a more effort to set up.

basis/bootstrap/image/upload/upload.factor

@@ -47,14 +47,7 @@ SYMBOL: build-images-destination
         ] each
     ] with-file-writer ;
 
-! Windows scp doesn't like pathnames with colons, it treats them as hostnames.
+: scp-name os ( -- path ) "scp" ;
-! Workaround for uploading checksums.txt created with temp-file.
-! e.g. C:\Users\\Doug\\AppData\\Local\\Temp/factorcode.org\\Factor/checksums.txt
-! ssh: Could not resolve hostname c: no address associated with name
-
-HOOK: scp-name os ( -- path )
-M: object scp-name "scp" ;
-M: windows scp-name "pscp" ;
 
 : upload-images ( -- )
     [