Remove obsolete tcp buffer size system properties.

These were deprecated back in 2014.  It's time to remove them now.

Test: None
Change-Id: Iefeab3a93d848e2c420f34eb80e9395eec6a49ac
diff --git a/init.hardware.rc b/init.hardware.rc
index 9a66806..299ca31 100644
--- a/init.hardware.rc
+++ b/init.hardware.rc
@@ -433,10 +433,6 @@
 
     setprop wifi.interface wlan0
 
-    # Define TCP buffer sizes for various networks
-    # ReadMin, ReadInitial, ReadMax, WriteMin, WriteInitial, WriteMax,
-    setprop net.tcp.buffersize.wifi    524288,2097152,4194304,262144,524288,1048576
-
     # Assign TCP buffer thresholds to be ceiling value of technology maximums
     # Increased technology maximums should be reflected here.
     write /proc/sys/net/core/rmem_max  8388608