Remove proofread files that aren't created

These would cause these actions (and any that depended upon them) to
re-run during every incremental build. These now produce warnings:

ninja: output file missing after successful execution: out/soong/.intermediates/frameworks/base/ds-ref-navtree-docs/android_common/ds-ref-navtree-docs-proofrerad.txt

It turns out that the -proofread argument to doclava is ignored with the
following argument combinations:

 * -static -devsite
 * -navtreeonly

Test: m docs; m docs (nothing to do)
Change-Id: I21b939951f5a2f33914e9fc9414df8206091d262
diff --git a/ApiDocs.bp b/ApiDocs.bp
index cac987c..bd4a32b 100644
--- a/ApiDocs.bp
+++ b/ApiDocs.bp
@@ -320,7 +320,7 @@
         ":framework-doc-stubs",
     ],
     args: "-noJdkLink -links https://kotlinlang.org/api/latest/jvm/stdlib/^external/dokka/package-list " +
-    "-noStdlibLink",
+        "-noStdlibLink",
     proofread_file: "ds-dokka-proofread.txt",
     dokka_enabled: true,
 }
@@ -340,7 +340,7 @@
         targets: ["docs"],
     },
     cmd: "$(location zip2zip) -i $(location :ds-docs-kt{.docs.zip}) -o $(genDir)/ds-docs-kt-moved.zip **/*:en/reference/kotlin && " +
-         "$(location merge_zips) $(out) $(location :ds-docs-java{.docs.zip}) $(genDir)/ds-docs-kt-moved.zip",
+        "$(location merge_zips) $(out) $(location :ds-docs-java{.docs.zip}) $(genDir)/ds-docs-kt-moved.zip",
 }
 
 java_genrule {
@@ -358,10 +358,10 @@
         targets: ["docs"],
     },
     cmd: "unzip -q $(location :ds-docs-java{.docs.zip}) -d $(genDir) && " +
-         "unzip -q $(location :ds-docs-kt{.docs.zip}) -d $(genDir)/en/reference/kotlin && " +
-         "SWITCHER=$$(cd $$(dirname $(location switcher4)) && pwd)/$$(basename $(location switcher4)) && " +
-         "(cd $(genDir)/en/reference && $$SWITCHER --work platform) > /dev/null && " +
-         "$(location soong_zip) -o $(out) -C $(genDir) -D $(genDir)",
+        "unzip -q $(location :ds-docs-kt{.docs.zip}) -d $(genDir)/en/reference/kotlin && " +
+        "SWITCHER=$$(cd $$(dirname $(location switcher4)) && pwd)/$$(basename $(location switcher4)) && " +
+        "(cd $(genDir)/en/reference && $$SWITCHER --work platform) > /dev/null && " +
+        "$(location soong_zip) -o $(out) -C $(genDir) -D $(genDir)",
 }
 
 droiddoc {
@@ -373,7 +373,6 @@
     hdf: [
         "android.whichdoc online",
     ],
-    proofread_file: "ds-static-docs-proofrerad.txt",
     args: framework_docs_only_args +
         " -staticonly " +
         " -toroot / " +
@@ -390,7 +389,6 @@
     hdf: [
         "android.whichdoc online",
     ],
-    proofread_file: "ds-ref-navtree-docs-proofrerad.txt",
     args: framework_docs_only_args +
         " -toroot / " +
         " -atLinksNavtree " +
@@ -437,4 +435,3 @@
         " -referenceonly " +
         " -title \"Android SDK - Including hidden APIs.\"",
 }
-