Remove old references to namespace blocks

Co-authored-by: Karthik Ravikanti <karthik.ravikanti@gmail.com>

parser-typechecker/src/Unison/FileParser.hs

@@ -184,11 +184,6 @@ checkForDuplicateTermsAndConstructors uf = do
 -- Or it is a binding like:
 --   foo : Nat -> Nat
 --   foo x = x + 42
--- Or it is a namespace like:
---   namespace Woot where
---     x = 42
---     y = 17
--- which parses as [(Woot.x, 42), (Woot.y, 17)]
 
 data Stanza v term
   = WatchBinding UF.WatchKind Ann ((Ann, v), term)

parser-typechecker/src/Unison/PrintError.hs

@@ -1413,8 +1413,6 @@ prettyParseError s = \case
             <> style Code "ability Foo where ...",
           "\n  - A `type` declaration, like "
             <> style Code "structural type Optional a = None | Some a",
-          "\n  - A `namespace` declaration, like "
-            <> style Code "namespace Seq where ...",
           "\n"
         ]
       where

unison-src/transcripts/error-messages.output.md

@@ -244,7 +244,6 @@ a ! b = 1
     - A watch expression, like > a + 1
     - An `ability` declaration, like ability Foo where ...
     - A `type` declaration, like structural type Optional a = None | Some a
-    - A `namespace` declaration, like namespace Seq where ...
   
 
 ```

unison-src/transcripts/errors/unison-hide-all.output.md

@@ -28,6 +28,5 @@ The transcript failed due to an error in the stanza above. The error is:
     - A watch expression, like > g + 1
     - An `ability` declaration, like ability Foo where ...
     - A `type` declaration, like structural type Optional a = None | Some a
-    - A `namespace` declaration, like namespace Seq where ...
 
 

unison-src/transcripts/errors/unison-hide.output.md

@@ -28,6 +28,5 @@ The transcript failed due to an error in the stanza above. The error is:
     - A watch expression, like > g + 1
     - An `ability` declaration, like ability Foo where ...
     - A `type` declaration, like structural type Optional a = None | Some a
-    - A `namespace` declaration, like namespace Seq where ...