Revert "+ testing: "Erase memory pages as soon as they are freed to prevent new processes getting old information" - https://github.com/sakindia123/htc_pico_kernel_3.x/commit/dafc5d3511a8f74d40c8908ec31abbb8f8066e7d"

This reverts commit 36e2488946e92e25035446818632bb4a350e0ed2.

Something is wrong with this commit, boot delayed allot, and boot
progress bar is shown after the logo,

i didnt see any wow change so, probably it's not adapted
to our 3.8.y MM code.