SkQP: remove unreliable tests DO NOT MERGE

These tests are now considered unreliable and
removed in future branches.  Backport to P.

Bug: 130124541
Bug: 130398818

Change-Id: I854b077c690ae80456cd2c7f360118d8f8385ca0
diff --git a/platform_tools/android/apps/skqp/src/main/assets/skqp/KnownGMs.txt b/platform_tools/android/apps/skqp/src/main/assets/skqp/KnownGMs.txt
index 2cdd166..d8b0408 100644
--- a/platform_tools/android/apps/skqp/src/main/assets/skqp/KnownGMs.txt
+++ b/platform_tools/android/apps/skqp/src/main/assets/skqp/KnownGMs.txt
@@ -547,7 +547,6 @@
 shadertext
 shadertext2
 shadertext3
-shadow_utils
 shadow_utils_gray
 shadow_utils_occl
 shadows
@@ -571,7 +570,6 @@
 simpleaaclip_path
 simpleaaclip_rect
 simpleblurroundrect
-simplerect
 simpleshapes
 simpleshapes_bw
 skbug1719
@@ -611,7 +609,6 @@
 textblobblockreordering
 textblobcolortrans
 textblobgeometrychange
-textbloblooper
 textblobmixedsizes
 textblobmixedsizes_df
 textblobrandomfont