Remove GCJ support

GCC7 dropped GCJ.

Closes https://sourceforge.net/p/swig/bugs/823/

Examples/tcl/check.list

@@ -5,7 +5,6 @@ contract
 enum
 funcptr
 import
-java
 multimap
 operator
 pointer

Examples/tcl/java/Example.java

@@ -1,29 +0,0 @@
-public class Example {
-    public   int      mPublicInt;
-    
-    public Example() {
-	mPublicInt = 0;
-    }
-    
-    public Example(int IntVal) {
-	mPublicInt = IntVal;
-    }
-    
-    
-    public int Add(int a, int b) {
-	return (a+b);
-    }
-    
-    public float Add(float a, float b) {
-	return (a+b);
-    }
-    
-    public String Add(String a, String b) {
-	return (a+b);
-    }
-    
-    public Example Add(Example a, Example b) {
-	return new Example(a.mPublicInt + b.mPublicInt);
-    }
-}
-

Examples/tcl/java/Makefile

@@ -1,24 +0,0 @@
-TOP        = ../..
-SWIGEXE    = $(TOP)/../swig
-SWIG_LIB_DIR = $(TOP)/../$(TOP_BUILDDIR_TO_TOP_SRCDIR)Lib
-CXXSRCS    =
-TARGET     = example
-INTERFACE  = example.i
-LIBS       = -lm
-
-check: build
-	$(MAKE) -f $(TOP)/Makefile SRCDIR='$(SRCDIR)' tcl_run
-
-build: Example.class Example.h
-	$(MAKE) -f $(TOP)/Makefile SRCDIR='$(SRCDIR)' CXXSRCS='$(CXXSRCS)' \
-	SWIG_LIB_DIR='$(SWIG_LIB_DIR)' SWIGEXE='$(SWIGEXE)' \
-	TARGET='$(TARGET)' INTERFACE='$(INTERFACE)' \
-	TCLCXXSHARED="gcj -fpic -shared Example.class " LIBS="-lstdc++" DEFS='' tcl_cpp
-
-clean:
-	$(MAKE) -f $(TOP)/Makefile SRCDIR='$(SRCDIR)' tcl_clean
-	rm -f *.class Example.h
-
-Example.class Example.h: $(SRCDIR)Example.java
-	gcj -d . -fPIC -C -c -g $(SRCDIR)Example.java
-	gcjh Example.class

Examples/tcl/java/example.i

@@ -1,8 +0,0 @@
-%module example
-%include <cni.i>
-
-%{
-#include "Example.h"
-%}
-
-%include Example.h

Examples/tcl/java/runme.tcl

@@ -1,15 +0,0 @@
-catch { load ./example[info sharedlibextension] example}
-
-JvCreateJavaVM  NULL
-JvAttachCurrentThread NULL NULL
-Example e1 1
-Example e2 2
-
-puts "[e1 cget -mPublicInt]"
-puts "[e2 cget -mPublicInt]"
-
-puts "[e2 Add 1 2]"
-puts "[e2 Add 1.0 2.0]"
-puts "[e2 Add '1' '2']"
-
-JvDetachCurrentThread