unparse: drop python 2 remnants (#40329)

lib/spack/spack/util/unparse/unparser.py

@@ -270,16 +270,6 @@ def visit_Assert(self, node):
             self.write(", ")
             self.dispatch(node.msg)
 
-    def visit_Exec(self, node):
-        self.fill("exec ")
-        self.dispatch(node.body)
-        if node.globals:
-            self.write(" in ")
-            self.dispatch(node.globals)
-        if node.locals:
-            self.write(", ")
-            self.dispatch(node.locals)
-
     def visit_Global(self, node):
         self.fill("global ")
         interleave(lambda: self.write(", "), self.write, node.names)
@@ -338,31 +328,6 @@ def visit_Try(self, node):
             with self.block():
                 self.dispatch(node.finalbody)
 
-    def visit_TryExcept(self, node):
-        self.fill("try")
-        with self.block():
-            self.dispatch(node.body)
-
-        for ex in node.handlers:
-            self.dispatch(ex)
-        if node.orelse:
-            self.fill("else")
-            with self.block():
-                self.dispatch(node.orelse)
-
-    def visit_TryFinally(self, node):
-        if len(node.body) == 1 and isinstance(node.body[0], ast.TryExcept):
-            # try-except-finally
-            self.dispatch(node.body)
-        else:
-            self.fill("try")
-            with self.block():
-                self.dispatch(node.body)
-
-        self.fill("finally")
-        with self.block():
-            self.dispatch(node.finalbody)
-
     def visit_ExceptHandler(self, node):
         self.fill("except")
         if node.type:
@@ -633,11 +598,6 @@ def visit_Name(self, node):
     def visit_NameConstant(self, node):
         self.write(repr(node.value))
 
-    def visit_Repr(self, node):
-        self.write("`")
-        self.dispatch(node.value)
-        self.write("`")
-
     def _write_constant(self, value):
         if isinstance(value, (float, complex)):
             # Substitute overflowing decimal literal for AST infinities.