delete deprecated IO-like methods

This commit deletes
{IO,ARGF,StringIO,Zib::GZipReader}#{bytes,chars,lines,codepoints}, which
have been deprecated since c47c095b9740e7c19d6fdca29ab661c1089221d4.

Note that String also has those methods.  They are neither depreacted
nor deleted because they are not aliases of counterpart each_something.

Author: shyouhei

ext/stringio/stringio.c

@@ -832,18 +832,6 @@ strio_each_byte(VALUE self)
     return self;
 }
 
-/*
- *  This is a deprecated alias for #each_byte.
- */
-static VALUE
-strio_bytes(VALUE self)
-{
-    rb_warn("StringIO#bytes is deprecated; use #each_byte instead");
-    if (!rb_block_given_p())
-	return rb_enumeratorize(self, ID2SYM(rb_intern("each_byte")), 0, 0);
-    return strio_each_byte(self);
-}
-
 /*
  * call-seq:
  *   strio.getc   -> string or nil
@@ -1057,18 +1045,6 @@ strio_each_char(VALUE self)
     return self;
 }
 
-/*
- *  This is a deprecated alias for #each_char.
- */
-static VALUE
-strio_chars(VALUE self)
-{
-    rb_warn("StringIO#chars is deprecated; use #each_char instead");
-    if (!rb_block_given_p())
-	return rb_enumeratorize(self, ID2SYM(rb_intern("each_char")), 0, 0);
-    return strio_each_char(self);
-}
-
 /*
  * call-seq:
  *   strio.each_codepoint {|c| block }  -> strio
@@ -1101,18 +1077,6 @@ strio_each_codepoint(VALUE self)
     return self;
 }
 
-/*
- *  This is a deprecated alias for #each_codepoint.
- */
-static VALUE
-strio_codepoints(VALUE self)
-{
-    rb_warn("StringIO#codepoints is deprecated; use #each_codepoint instead");
-    if (!rb_block_given_p())
-	return rb_enumeratorize(self, ID2SYM(rb_intern("each_codepoint")), 0, 0);
-    return strio_each_codepoint(self);
-}
-
 /* Boyer-Moore search: copied from regex.c */
 static void
 bm_init_skip(long *skip, const char *pat, long m)
@@ -1363,18 +1327,6 @@ strio_each(int argc, VALUE *argv, VALUE self)
     return self;
 }
 
-/*
- *  This is a deprecated alias for #each_line.
- */
-static VALUE
-strio_lines(int argc, VALUE *argv, VALUE self)
-{
-    rb_warn("StringIO#lines is deprecated; use #each_line instead");
-    if (!rb_block_given_p())
-	return rb_enumeratorize(self, ID2SYM(rb_intern("each_line")), argc, argv);
-    return strio_each(argc, argv, self);
-}
-
 /*
  * call-seq:
  *   strio.readlines(sep=$/, chomp: false)     ->   array
@@ -1843,13 +1795,9 @@ Init_stringio(void)
 
     rb_define_method(StringIO, "each", strio_each, -1);
     rb_define_method(StringIO, "each_line", strio_each, -1);
-    rb_define_method(StringIO, "lines", strio_lines, -1);
     rb_define_method(StringIO, "each_byte", strio_each_byte, 0);
-    rb_define_method(StringIO, "bytes", strio_bytes, 0);
     rb_define_method(StringIO, "each_char", strio_each_char, 0);
-    rb_define_method(StringIO, "chars", strio_chars, 0);
     rb_define_method(StringIO, "each_codepoint", strio_each_codepoint, 0);
-    rb_define_method(StringIO, "codepoints", strio_codepoints, 0);
     rb_define_method(StringIO, "getc", strio_getc, 0);
     rb_define_method(StringIO, "ungetc", strio_ungetc, 1);
     rb_define_method(StringIO, "ungetbyte", strio_ungetbyte, 1);