Remove custom and lsearch and tsearch

The implementations of lsearch and tsearch were kept in order to support
emscripten in the past. They lie unused for now, and will only complicate the
move to a new build system, so they are being removed now.

Author: kulp

.gitmodules

@@ -4,9 +4,6 @@
 [submodule "3rdparty/wb_intercon"]
     path = 3rdparty/wb_intercon
     url = https://github.com/olofk/wb_intercon.git
-[submodule "3rdparty/naive-tsearch"]
-    path = 3rdparty/naive-tsearch
-    url = https://github.com/kulp/naive-tsearch.git
 [submodule "3rdparty/ulx3s"]
 	path = 3rdparty/ulx3s
 	url = https://github.com/emard/ulx3s.git

3rdparty/naive-tsearch

@@ -34,18 +34,6 @@ tsim_OBJECTS   = $(common_OBJECTS) simif.o asm.o obj.o plugin.o \
                  $(DEVOBJS) sim.o
 tld_OBJECTS    = $(common_OBJECTS) obj.o
 
-ifeq ($(USE_OWN_SEARCH),1)
-vpath %.c $(TOP)/3rdparty/naive-tsearch
-# The interface of lsearch and tsearch is not something we can change.
-lsearch.o tsearch.o: CFLAGS += -W$(PEDANTRY_EXCEPTION)cast-qual
-# tsearch.o from naive-tsearch has feature flags
-tsearch.o: CFLAGS += -Wno-unused-macros
-
-tas_OBJECTS   += lsearch.o tsearch.o
-tld_OBJECTS   += lsearch.o tsearch.o
-tsim_OBJECTS  += lsearch.o tsearch.o
-endif
-
 showbuilddir:
 	@echo $(abspath $(BUILDDIR))