patch 9.0.1994: inconsistent feature description

Problem:  inconsistent feature description
Solution: delete old mentioned feature sets small and big

The may however still be mentioned for historical reasons. e.g. The
last Amiga built version is for Vim6.2 and is still a big version.

closes: #13273

Signed-off-by: Christian Brabandt <cb@256bit.org>
Co-authored-by: RestorerZ <restorer@mail2k.ru>

runtime/doc/starting.txt

@@ -1704,6 +1704,6 @@ most of the information will be restored).
 			If you get the |press-enter| prompt you can press "q"
 			and still get the prompt to enter a file number.
 			Use ! to abandon a modified buffer. |abandon|
-			{not when compiled with tiny or small features}
+			{not when compiled with tiny features}
 
  vim:tw=78:ts=8:noet:ft=help:norl:

runtime/doc/testing.txt

@@ -21,7 +21,7 @@ Vim can be tested after building it, usually with "make test".
 The tests are located in the directory "src/testdir".
 
 There are two types of tests added over time:
-	test20.in		oldest, only for tiny and small builds
+	test20.in		oldest, only for tiny builds
 	test_something.vim	new style tests
 
 						*new-style-testing*

runtime/doc/usr_90.txt

@@ -173,9 +173,8 @@ enabled from the Makefile.
 
 	--prefix={directory}		Top directory where to install Vim.
 
-	--with-features=tiny		Compile with many features disabled.
-	--with-features=small		Compile with some features disabled.
-	--with-features=big		Compile with more features enabled.
+	--with-features=tiny		Compile with some features disabled.
+	--with-features=normal		Compile with more features enabled.
 	--with-features=huge		Compile with most features enabled.
 					See |+feature-list| for which feature
 					is enabled in which case.

runtime/doc/various.txt

@@ -320,15 +320,13 @@ g8			Print the hex values of the bytes used in the
 			The first column shows the smallest version in which
 			they are included:
 			   T	tiny (always)
-			   S	small
 			   N	normal
-			   B	big
 			   H	huge
 			   m	manually enabled or depends on other features
 			   -    never, feature was removed
 			 (none) system dependent
 			Thus if a feature is marked with "N", it is included
-			in the normal, big and huge versions of Vim.
+			in the normal and huge versions of Vim.
 
 							*+feature-list*
    *+acl*		|ACL| support included