Create import statement evaluator and update standard library

smnp/runtime/evaluators/imports.py

@@ -1,4 +1,3 @@
-from smnp.ast.node.none import NoneNode
 from smnp.program.interpreter import Interpreter
 from smnp.runtime.evaluator import Evaluator
 
@@ -7,13 +6,6 @@ class ImportEvaluator(Evaluator):
 
     @classmethod
     def evaluator(cls, node, environment):
-        if type(node.type) == NoneNode:
-            cls._evaluateCodeImport(node, environment)
-        else:
-            raise RuntimeError("Importing types is not implemented yet")
-
-    @classmethod
-    def _evaluateCodeImport(cls, node, environment):
         source = node.source
         newEnvironment = Interpreter.interpretFile(source.value)
         environment.extend(newEnvironment)