Remove unnecessary glob depFile phony rule

The glob depFile is not a listed output file of a rule, so it will
never be deleted by the cleanup phase.  Remove the unnecessary phony
rule to avoid a warning when running soong -d explain:
ninja explain: output .intermediates/androidmk/glob/build/soong/Androidmk.d of phony edge with no inputs doesn't exist

Change-Id: I40ed5a28fb29b8455981f6debf1de2ea21c911ea

common/glob.go

@@ -104,12 +104,6 @@ func GlobRule(ctx globContext, globPattern string, excludes []string,
 			"excludes": JoinWithPrefixAndQuote(excludes, "-e "),
 		},
 	})
-
-	// Phony rule so the cleanup phase doesn't delete the depFile
-	ctx.Build(pctx, blueprint.BuildParams{
-		Rule:    blueprint.Phony,
-		Outputs: []string{depFile},
-	})
 }
 
 func globToString(glob string) string {