sm6250-common: Remove lmkd properties to enable new lmkd kill strategy

With new strategy default values for lmkd properties should work
and no property overrides are necessary.

Bug: 143857475
Test: lmkd_unit_test
Change-Id: I52c8c93ad5adb5e741790939e381b7c0adae4261

product.prop

@@ -7,9 +7,6 @@ debug.gralloc.enable_fb_ubwc=1
 
 # LMKD
 ro.config.low_ram=false
-ro.lmk.kill_heaviest_task=true
-ro.lmk.kill_timeout_ms=100
-ro.lmk.use_minfree_levels=true
 
 # Incremental FS
 ro.incremental.enable=1