remove unneeded code, update changes

Changes

@@ -1,5 +1,9 @@
 Revision history for Selenium-Remote-Driver
 
+1.31   XX-XX-XXXX TEODESIAN
+        [BUG FIXES]
+        - Kill dangling driver processes in Selenium::Chrome/Firefox on unix hosts
+
 1.30   09-17-2018 TEODESIAN
         [BUG FIXES]
         - Fix broken name selector polyfill when using Selenium::Firefox directly

lib/Selenium/CanStartBinary.pm

@@ -354,15 +354,6 @@ sub _build_binary_mode {
     }
 }
 
-sub _run_binary {
-    my ($self,@command) = @_;
-
-    $self->{pid} = fork() or die "could not fork to run driver process!";
-    return if $self->{pid};
-    #We don't care about the output.
-    capture_merged { system @command };
-}
-
 sub _handle_firefox_setup {
     my ($self, $port) = @_;