Remove Bwana.app support

Bwana.app has been stale for years. It no longer works properly.

modules/osx/functions/_manb

@@ -1,8 +1,8 @@
-#compdef manb manp
+#compdef manp
 #autoload
 
 #
-# Completes manb and manp.
+# Completes manp.
 #
 # Authors:
 #   Sorin Ionescu <sorin.ionescu@gmail.com>

modules/osx/functions/manb

@@ -1,24 +0,0 @@
-#
-# Opens man pages in Bwana.app.
-#
-# Authors:
-#   Sorin Ionescu <sorin.ionescu@gmail.com>
-#
-
-function manb {
-  local page
-  if (( $# > 0 )); then
-    for page in "$@"; do
-      open "man://$page" 2>/dev/null
-      if (( $? != 0 )); then
-        print "$0: Bwana is not installed" >&2
-        break
-      fi
-    done
-  else
-    print 'What manual page do you want?' >&2
-  fi
-}
-
-manb "$@"
-