telemetry: Remove PageTest support from benchmark_runner

tools/telemetry/telemetry/core/environment.py

Index: tools/telemetry/telemetry/core/environment.py
diff --git a/tools/telemetry/telemetry/core/environment.py b/tools/telemetry/telemetry/core/environment.py
index 04bafc8ed2aa26d79baedf7404f98c2d451ce2e3..3900682284d0a3ab8aa5f00ea542dd8021cd1c1e 100644
--- a/tools/telemetry/telemetry/core/environment.py
+++ b/tools/telemetry/telemetry/core/environment.py
@@ -4,17 +4,17 @@
 
 
 class Environment(object):
-  def __init__(self, base_paths, test_aliases=None):
+  def __init__(self, base_paths, benchmark_aliases=None):
     self._base_paths = base_paths
-    if test_aliases:
-      self._test_aliases = test_aliases
+    if benchmark_aliases:
+      self._benchmark_aliases = benchmark_aliases
     else:
-      self._test_aliases = {}
+      self._benchmark_aliases = {}
 
   @property
   def base_paths(self):
     return self._base_paths
 
   @property
-  def test_aliases(self):
-    return self._test_aliases
+  def benchmark_aliases(self):
+    return self._benchmark_aliases