Revert "Include all_aconfig_declarations in docs dist"

This reverts commit 90c2af97ed756822b885a1b53f86f83927041b52.

Reason for revert: Includes too many flags.  The on-device copy of aconfig declarations must be **only** those that are used by code on the device.  `all_aconfig_declarations` is every aconfig flag in the source tree, and cannot be placed on the device.

Change-Id: Id7ac61c0805825b4ca27fffe84a48f95e3c682b2
diff --git a/aconfig/all_aconfig_declarations.go b/aconfig/all_aconfig_declarations.go
index e771d05..72fe495 100644
--- a/aconfig/all_aconfig_declarations.go
+++ b/aconfig/all_aconfig_declarations.go
@@ -89,7 +89,7 @@
 
 func (this *allAconfigDeclarationsSingleton) MakeVars(ctx android.MakeVarsContext) {
 	ctx.DistForGoal("droid", this.intermediateBinaryProtoPath)
-	for _, goal := range []string{"docs", "droid", "sdk"} {
+	for _, goal := range []string{"droid", "sdk"} {
 		ctx.DistForGoalWithFilename(goal, this.intermediateBinaryProtoPath, "flags.pb")
 		ctx.DistForGoalWithFilename(goal, this.intermediateTextProtoPath, "flags.textproto")
 	}