oocd_trace: drop the code, deprecated in v0.10.0

The code for oocd_trace has been marked as deprecated in release
v0.10.0, 4 years ago.

Time to drop it!

Change-Id: I989f8345dee4ff2369bcf5e2e2ace86bbd5aa6a5
Signed-off-by: Antonio Borneo <borneo.antonio@gmail.com>
Reviewed-on: http://openocd.zylin.com/6088
Tested-by: jenkins

src/target/Makefile.am

@@ -1,9 +1,3 @@
-if OOCD_TRACE
-OOCD_TRACE_FILES = %D%/oocd_trace.c
-else
-OOCD_TRACE_FILES =
-endif
-
 %C%_libtarget_la_LIBADD = %D%/openrisc/libopenrisc.la \
 	%D%/riscv/libriscv.la
 
@@ -111,7 +105,6 @@ ARM_DEBUG_SRC = \
 	%D%/trace.c \
 	%D%/etb.c \
 	%D%/etm.c \
-	$(OOCD_TRACE_FILES) \
 	%D%/etm_dummy.c \
 	%D%/arm_tpiu_swo.c \
 	%D%/arm_cti.c
@@ -225,7 +218,6 @@ ARC_SRC = \
 	%D%/mips32_pracc.h \
 	%D%/mips32_dmaacc.h \
 	%D%/mips64_pracc.h \
-	%D%/oocd_trace.h \
 	%D%/register.h \
 	%D%/target.h \
 	%D%/target_type.h \