Remove bazel_module.label from bionic genrules

Mixed builds can now use the label from an automatically converted
target.

Test: build/bazel/scripts/milestone-2/demo.sh full
Test: build/bazel/scripts/milestone-2/demo.sh generate
      build/bazel/scripts/milestone-2/demo.sh sync
      mixed build of libc
      build/bazel/scripts/milestone-2/demo.sh cleanup
Change-Id: I1499b75f1348bf342b4cd134606786150b2f8b26
diff --git a/libc/Android.bp b/libc/Android.bp
index 46312d8..dfbb7c1 100644
--- a/libc/Android.bp
+++ b/libc/Android.bp
@@ -1290,7 +1290,6 @@
     cmd: "$(location :bionic-gensyscalls) arm $(in) > $(out)",
     bazel_module: {
         bp2build_available: true,
-        label: "//bionic/libc:syscalls-arm.S"
     }
 }
 
@@ -1302,7 +1301,6 @@
     cmd: "$(location :bionic-gensyscalls) arm64 $(in) > $(out)",
     bazel_module: {
         bp2build_available: true,
-        label: "//bionic/libc:syscalls-arm64.S"
     },
 }
 
@@ -1314,7 +1312,6 @@
     cmd: "$(location :bionic-gensyscalls) x86 $(in) > $(out)",
     bazel_module: {
         bp2build_available: true,
-        label: "//bionic/libc:syscalls-x86.S"
     },
 }
 
@@ -1326,7 +1323,6 @@
     cmd: "$(location :bionic-gensyscalls) x86_64 $(in) > $(out)",
     bazel_module: {
         bp2build_available: true,
-        label: "//bionic/libc:syscalls-x86_64.S"
     },
 }