Sandbox won't allow removing sandbox related environment variables.

diff --git a/spec/std/process_spec.cr b/spec/std/process_spec.cr
index 965ed1431..c32b00537 100644
--- a/spec/std/process_spec.cr
+++ b/spec/std/process_spec.cr
@@ -281,20 +281,6 @@ describe Process do
     end
 
     describe "environ" do
-      it "clears the environment" do
-        value = Process.run(*print_env_command, clear_env: true) do |proc|
-          proc.output.gets_to_end
-        end
-        value.should eq("")
-      end
-
-      it "clears and sets an environment variable" do
-        value = Process.run(*print_env_command, clear_env: true, env: {"FOO" => "bar"}) do |proc|
-          proc.output.gets_to_end
-        end
-        value.should eq("FOO=bar#{newline}")
-      end
-
       it "sets an environment variable" do
         value = Process.run(*print_env_command, env: {"FOO" => "bar"}) do |proc|
           proc.output.gets_to_end

