rephrase deprecation message, remove redundant test lines

Signed-off-by: arezaii <ahmad.rezaii@hpe.com>

modules/standard/Regex.chpl

@@ -1142,14 +1142,14 @@ inline operator :(x: regex(bytes), type t: bytes) {
 
 // Cast string to regex
 pragma "no doc"
-deprecated "Casting strings to regex is deprecated. Use regex.compile(string) instead."
+deprecated "Casting strings to regex is deprecated. Use compile(string) from the Regex module instead."
 inline operator :(x: string, type t: regex(string)) throws {
   return compile(x);
 }
 
 // Cast bytes to regex
 pragma "no doc"
-deprecated "Casting bytes to regex is deprecated. Use regex.compile(bytes) instead."
+deprecated "Casting bytes to regex is deprecated. Use compile(bytes) from the Regex module instead."
 inline operator :(x: bytes, type t: regex(bytes)) throws {
   return compile(x);
 }

test/deprecated/regexTertiary.good

@@ -1,5 +1,5 @@
-regexTertiary.chpl:8: warning: Casting strings to regex is deprecated. Use regex.compile(string) instead.
-regexTertiary.chpl:9: warning: Casting bytes to regex is deprecated. Use regex.compile(bytes) instead.
+regexTertiary.chpl:8: warning: Casting strings to regex is deprecated. Use compile(string) from the Regex module instead.
+regexTertiary.chpl:9: warning: Casting bytes to regex is deprecated. Use compile(bytes) from the Regex module instead.
 regexTertiary.chpl:11: warning: string.search is deprecated, use regex search instead
 regexTertiary.chpl:12: warning: bytes.search is deprecated, use regex search instead
 regexTertiary.chpl:14: warning: string.search is deprecated, use regex search instead

test/regex/bytes/cast.chpl

@@ -5,16 +5,6 @@ use Regex;
 var s = "contains";
 var b = b"contains";
 
-var rs = s:regex(string);
-var rb = b:regex(bytes);
-
-writeln("contains regular expression".find(rs));
-writeln(b"contains regular expression".find(rb));
-
-writeln("doesn't contain regular expression".find(rs));
-writeln(b"doesn't contain regular expression".find(rb));
-
-
 var rcs = compile(s);
 var rcb = compile(b);
 

test/regex/bytes/cast.good

@@ -1,9 +1,3 @@
-cast.chpl:8: warning: Casting strings to regex is deprecated. Use regex.compile(string) instead.
-cast.chpl:9: warning: Casting bytes to regex is deprecated. Use regex.compile(bytes) instead.
-0
-0
--1
--1
 0
 0
 -1