Don't mention "serial" in target remote description

PR remote/9177 points out that "info files" mentions "serial" a couple
of times:

    Remote serial target in gdb-specific protocol:
    Debugging a target over a serial line.

However, often the remote target isn't really a serial connection.

It seems to me that this text could be a bit clearer; and furthermore
since "info files" prints the target's long description,
remote_target::files_info doesn't really add much and can simply be
removed.

Regression tested on x86-64 Fedora 34.

Bug: https://sourceware.org/bugzilla/show_bug.cgi?id=9177

3 files changed, 7 insertions, 14 deletions

diff --git a/gdb/remote.c b/gdb/remote.c
index 290edd0..b126532 100644
--- a/gdb/remote.c
+++ b/gdb/remote.c
@@ -391,7 +391,7 @@ private:
 
 static const target_info remote_target_info = {
   "remote",
-  N_("Remote serial target in gdb-specific protocol"),
+  N_("Remote target using gdb-specific protocol"),
   remote_doc
 };
 
@@ -426,8 +426,6 @@ public:
   void store_registers (struct regcache *, int) override;
   void prepare_to_store (struct regcache *) override;
 
-  void files_info () override;
-
   int insert_breakpoint (struct gdbarch *, struct bp_target_info *) override;
 
   int remove_breakpoint (struct gdbarch *, struct bp_target_info *,
@@ -959,7 +957,7 @@ private:
 
 static const target_info extended_remote_target_info = {
   "extended-remote",
-  N_("Extended remote serial target in gdb-specific protocol"),
+  N_("Extended remote target using gdb-specific protocol"),
   remote_doc
 };
 
@@ -9420,11 +9418,6 @@ remote_target::flash_done ()
     }
 }
 
-void
-remote_target::files_info ()
-{
-  puts_filtered ("Debugging a target over a serial line.\n");
-}
 
 /* Stuff for dealing with the packets which are part of this protocol.
    See comment at top of file for details.  */
diff --git a/gdb/testsuite/gdb.multi/multi-target-info-inferiors.exp b/gdb/testsuite/gdb.multi/multi-target-info-inferiors.exp
index bb4efa1..8b0c6c9 100644
--- a/gdb/testsuite/gdb.multi/multi-target-info-inferiors.exp
+++ b/gdb/testsuite/gdb.multi/multi-target-info-inferiors.exp
@@ -89,9 +89,9 @@ proc test_info_inferiors {multi_process} {
 		[multi_line \
 		     "Num${ws}What${ws}Description${ws}" \
 		     "[connection_num 1 $inf]${ws}native${ws}Native process${ws}" \
-		     "[connection_num 2 $inf]${ws}extended-remote localhost:$decimal${ws}Extended remote serial target in gdb-specific protocol${ws}" \
+		     "[connection_num 2 $inf]${ws}extended-remote localhost:$decimal${ws}Extended remote target using gdb-specific protocol${ws}" \
 		     "[connection_num 3 $inf]${ws}core${ws}Local core dump file${ws}" \
-		     "[connection_num 4 $inf]${ws}extended-remote localhost:$decimal${ws}Extended remote serial target in gdb-specific protocol${ws}" \
+		     "[connection_num 4 $inf]${ws}extended-remote localhost:$decimal${ws}Extended remote target using gdb-specific protocol${ws}" \
 		     "[connection_num 5 $inf]${ws}core${ws}Local core dump file${ws}" \
 		    ]
 
@@ -100,9 +100,9 @@ proc test_info_inferiors {multi_process} {
 		    [multi_line \
 			 "Num${ws}What${ws}Description" \
 			 "[connection_num 1 $inf]${ws}native${ws}Native process" \
-			 "[connection_num 2 $inf]${ws}extended-remote localhost:$decimal${ws}Extended remote serial target in gdb-specific protocol" \
+			 "[connection_num 2 $inf]${ws}extended-remote localhost:$decimal${ws}Extended remote target using gdb-specific protocol" \
 			 "[connection_num 3 $inf]${ws}core${ws}Local core dump file" \
-			 "[connection_num 4 $inf]${ws}extended-remote localhost:$decimal${ws}Extended remote serial target in gdb-specific protocol" \
+			 "[connection_num 4 $inf]${ws}extended-remote localhost:$decimal${ws}Extended remote target using gdb-specific protocol" \
 			 "[connection_num 5 $inf]${ws}core${ws}Local core dump file" \
 			]
 	    }
diff --git a/gdb/testsuite/lib/gdb.exp b/gdb/testsuite/lib/gdb.exp
index 60f7b83..c69cb00 100644
--- a/gdb/testsuite/lib/gdb.exp
+++ b/gdb/testsuite/lib/gdb.exp
@@ -3884,7 +3884,7 @@ proc gdb_is_target_1 { target_name target_stack_regexp prompt_regexp } {
 # Helper for gdb_is_target_remote where the expected prompt is variable.
 
 proc gdb_is_target_remote_prompt { prompt_regexp } {
-    return [gdb_is_target_1 "remote" ".*emote serial target in gdb-specific protocol.*" $prompt_regexp]
+    return [gdb_is_target_1 "remote" ".*emote target using gdb-specific protocol.*" $prompt_regexp]
 }
 
 # Check whether we're testing with the remote or extended-remote