DM/PDF: stop adding unused rasterizer keywords

tools/dm_flags.json

Index: tools/dm_flags.json
diff --git a/tools/dm_flags.json b/tools/dm_flags.json
index 19311761982cb1470d19ed855ce8374004b93f79..46954457f3dd3283e323889b4516c6dd022609c7 100644
--- a/tools/dm_flags.json
+++ b/tools/dm_flags.json
@@ -6,7 +6,6 @@
     "gpu", 
     "gpusrgb", 
     "pdf", 
-    "pdf_poppler", 
     "serialize-8888", 
     "tiles_rt-8888", 
     "pic-8888", 
@@ -2038,7 +2037,6 @@
     "gpusrgb", 
     "msaa16", 
     "pdf", 
-    "pdf_poppler", 
     "serialize-8888", 
     "tiles_rt-8888", 
     "pic-8888", 
@@ -2384,7 +2382,6 @@
     "gpusrgb", 
     "msaa16", 
     "pdf", 
-    "pdf_poppler", 
     "serialize-8888", 
     "tiles_rt-8888", 
     "pic-8888", 
@@ -2638,7 +2635,6 @@
     "2ndpic-8888", 
     "msaa16", 
     "pdf", 
-    "pdf_poppler", 
     "serialize-8888", 
     "tiles_rt-8888", 
     "pic-8888", 
@@ -2863,7 +2859,6 @@
     "2ndpic-8888", 
     "msaa16", 
     "pdf", 
-    "pdf_poppler", 
     "serialize-8888", 
     "tiles_rt-8888", 
     "pic-8888", 
@@ -3085,7 +3080,6 @@
     "2ndpic-8888", 
     "msaa16", 
     "pdf", 
-    "pdf_poppler", 
     "serialize-8888", 
     "tiles_rt-8888", 
     "pic-8888", 
@@ -3326,7 +3320,6 @@
     "nvprdit16", 
     "msaa16", 
     "pdf", 
-    "pdf_poppler", 
     "serialize-8888", 
     "tiles_rt-8888", 
     "pic-8888", 
@@ -3660,7 +3653,6 @@
     "gpusrgb", 
     "msaa16", 
     "pdf", 
-    "pdf_poppler", 
     "serialize-8888", 
     "tiles_rt-8888", 
     "pic-8888",