Remove libbase-nofloat.a variant

As vsnprintf is no longer compiled it was
identical to libbase.a.

Picolibc defines levels of printf and scanf
https://github.com/picolibc/picolibc/blob/main/doc/printf.md#printf-and-scanf-levels-in-picolibc
so those should probably be used.

litex/soc/integration/builder.py

@@ -114,9 +114,6 @@ class Builder:
 
         for name in soc_software_packages:
             self.add_software_package(name)
-
-            if name == "libbase":
-                name += "-nofloat"
             self.add_software_library(name)
 
     def add_software_package(self, name, src_dir=None):

litex/soc/software/demo/Makefile

@@ -25,7 +25,7 @@ demo.elf: $(OBJECTS)
 		$(OBJECTS) \
 		-L$(BUILD_DIR)/software/libbase \
 		-L$(BUILD_DIR)/software/libcompiler_rt \
-		-lbase-nofloat -lcompiler_rt
+		-lbase -lcompiler_rt
 	chmod -x $@
 
 main.o: main.c

litex/soc/software/libbase/Makefile

@@ -15,14 +15,11 @@ OBJECTS = exception.o \
 	memtest.o         \
 	sim_debug.o
 
-all: crt0.o libbase.a libbase-nofloat.a
+all: crt0.o libbase.a
 
 libbase.a: $(OBJECTS)
 	$(AR) crs libbase.a $(OBJECTS)
 
-libbase-nofloat.a: $(OBJECTS)
-	$(AR) crs libbase-nofloat.a $(OBJECTS)
-
 # pull in dependency info for *existing* .o files
 -include $(OBJECTS:.o=.d)
 
@@ -38,5 +35,5 @@ crt0.o: $(CPU_DIRECTORY)/crt0.S
 .PHONY: all clean
 
 clean:
-	$(RM) $(OBJECTS) crt0.o vsnprintf.o vsnprintf-nofloat.o
-	$(RM) libbase.a libbase-nofloat.a .*~ *~
+	$(RM) $(OBJECTS) crt0.o
+	$(RM) libbase.a .*~ *~