Remove SHELL_COLOR build flag

Now that mp_printf() no longer prints the CPU MPID at the beginning of
each string, the SHELL_COLOR build flag has no effect.

Change-Id: Ia70c46d21bae9d14ff1177a5dae18f1006d5eed1
Signed-off-by: Sandrine Bailleux <sandrine.bailleux@arm.com>
diff --git a/Makefile b/Makefile
index 9c4ae7e..7456858 100644
--- a/Makefile
+++ b/Makefile
@@ -133,7 +133,6 @@
 $(eval $(call assert_boolean,FIRMWARE_UPDATE))
 $(eval $(call assert_boolean,FWU_BL_TEST))
 $(eval $(call assert_boolean,NEW_TEST_SESSION))
-$(eval $(call assert_boolean,SHELL_COLOR))
 $(eval $(call assert_boolean,USE_NVM))
 
 ################################################################################
@@ -148,7 +147,6 @@
 $(eval $(call add_define,TFTF_DEFINES,LOG_LEVEL))
 $(eval $(call add_define,TFTF_DEFINES,NEW_TEST_SESSION))
 $(eval $(call add_define,TFTF_DEFINES,PLAT_${PLAT}))
-$(eval $(call add_define,TFTF_DEFINES,SHELL_COLOR))
 $(eval $(call add_define,TFTF_DEFINES,USE_NVM))
 
 ifeq (${ARCH},aarch32)
diff --git a/defaults.mk b/defaults.mk
index 63c1b2e..0f74652 100644
--- a/defaults.mk
+++ b/defaults.mk
@@ -37,9 +37,6 @@
 # framework should try to resume a previous one if it was interrupted
 NEW_TEST_SESSION	:= 1
 
-# Use of shell colors
-SHELL_COLOR		:= 0
-
 # Use non volatile memory for storing results
 USE_NVM			:= 0
 
diff --git a/docs/user-guide.rst b/docs/user-guide.rst
index 397b4c2..e11a6bf 100644
--- a/docs/user-guide.rst
+++ b/docs/user-guide.rst
@@ -367,11 +367,6 @@
    session was interrupted and resume it. It can take either 1 (always
    start new session) or 0 (resume session as appropriate). 1 is the default.
 
--  ``SHELL_COLOR``: Choose whether text messages should use shell's color escape
-   sequences to ease identifying which CPU displays it. If enabled, this makes
-   each CPU write part of the message in a different color. It can take either
-   0 (disabled) or 1 (enabled) as values. 0 is the default.
-
 -  ``TESTS``: Set of tests to run. Use the following command to list all
    possible sets of tests: