patch 8.2.4993: smart/C/lisp indenting is optional

Problem:    smart/C/lisp indenting is optional, which makes the code more
            complex, while it only reduces the executable size a bit.
Solution:   Graduate FEAT_CINDENT, FEAT_SMARTINDENT and FEAT_LISP.
diff --git a/src/buffer.c b/src/buffer.c
index 3234138..88528e9 100644
--- a/src/buffer.c
+++ b/src/buffer.c
@@ -290,9 +290,7 @@
     if (curbuf->b_flags & BF_NEVERLOADED)
     {
 	(void)buf_init_chartab(curbuf, FALSE);
-#ifdef FEAT_CINDENT
 	parse_cino(curbuf);
-#endif
     }
 
     // Set/reset the Changed flag first, autocmds may change the buffer.
@@ -2274,7 +2272,7 @@
     clear_string_option(&buf->b_p_inex);
 # endif
 #endif
-#if defined(FEAT_CINDENT) && defined(FEAT_EVAL)
+#if defined(FEAT_EVAL)
     clear_string_option(&buf->b_p_inde);
     clear_string_option(&buf->b_p_indk);
 #endif
@@ -2335,14 +2333,10 @@
     clear_string_option(&buf->b_p_sua);
 #endif
     clear_string_option(&buf->b_p_ft);
-#ifdef FEAT_CINDENT
     clear_string_option(&buf->b_p_cink);
     clear_string_option(&buf->b_p_cino);
     clear_string_option(&buf->b_p_cinsd);
-#endif
-#if defined(FEAT_CINDENT) || defined(FEAT_SMARTINDENT)
     clear_string_option(&buf->b_p_cinw);
-#endif
     clear_string_option(&buf->b_p_cpt);
 #ifdef FEAT_COMPL_FUNC
     clear_string_option(&buf->b_p_cfu);
@@ -2372,9 +2366,7 @@
 #endif
     buf->b_p_ar = -1;
     buf->b_p_ul = NO_LOCAL_UNDOLEVEL;
-#ifdef FEAT_LISP
     clear_string_option(&buf->b_p_lw);
-#endif
     clear_string_option(&buf->b_p_bkc);
     clear_string_option(&buf->b_p_menc);
 }