Remove unused "imx" target

This is a leftover of previous reincarnation of imx
implementation and it is not needed anymore.

Bug: 112898749
Change-Id: I5d67f41203a31e02aa7a4f7175d8ac582df45572
diff --git a/target/imx/rules.mk b/target/imx/rules.mk
deleted file mode 100644
index 2058adb..0000000
--- a/target/imx/rules.mk
+++ /dev/null
@@ -1,25 +0,0 @@
-#
-# Copyright (c) 2015, Google, Inc. All rights reserved
-#
-# Permission is hereby granted, free of charge, to any person obtaining
-# a copy of this software and associated documentation files
-# (the "Software"), to deal in the Software without restriction,
-# including without limitation the rights to use, copy, modify, merge,
-# publish, distribute, sublicense, and/or sell copies of the Software,
-# and to permit persons to whom the Software is furnished to do so,
-# subject to the following conditions:
-#
-# The above copyright notice and this permission notice shall be
-# included in all copies or substantial portions of the Software.
-#
-# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
-# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
-# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
-# IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
-# CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
-# TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
-# SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
-#
-
-PLATFORM := imx
-