auto-fix dependencies in "pkgs"

Left one dependency broken: "drracket" currently depends on "htdp" for
a test. That needs to be fixed by removing the dependency (moving the
test to "htdp?), instead of changing the declared dependencies.

original commit: 51290fd2a9

pkgs/racket-pkgs/at-exp-lib/info.rkt

@@ -1,3 +1,4 @@
 #lang setup/infotab
 
 (define collection 'multi)
+(define deps '("base"))