Remove MetaUnit and refactor unit comparisons

If the same unit is defined in different packages, this now leads to an error.
The error shows the package in which they are not aligned as well as the root.

Author: HeikoBecker

code/languages/org.iets3.opensource/languages/org.iets3.core.expr.typetags.units/models/behavior.mps

@@ -19,13 +19,6 @@
       <concept id="1224240836180" name="jetbrains.mps.lang.structure.structure.DeprecatedNodeAnnotation" flags="ig" index="asaX9">
         <property id="1225118933224" name="comment" index="YLQ7P" />
       </concept>
-      <concept id="6054523464627964745" name="jetbrains.mps.lang.structure.structure.AttributeInfo_AttributedConcept" flags="ng" index="trNpa">
-        <reference id="6054523464627965081" name="concept" index="trN6q" />
-      </concept>
-      <concept id="2992811758677295509" name="jetbrains.mps.lang.structure.structure.AttributeInfo" flags="ng" index="M6xJ_">
-        <property id="7588428831955550663" name="role" index="Hh88m" />
-        <child id="7588428831947959310" name="attributed" index="EQaZv" />
-      </concept>
       <concept id="1169125787135" name="jetbrains.mps.lang.structure.structure.AbstractConceptDeclaration" flags="ig" index="PkWjJ">
         <property id="6714410169261853888" name="conceptId" index="EcuMT" />
         <property id="4628067390765907488" name="conceptShortDescription" index="R4oN_" />
@@ -201,55 +194,6 @@
       <ref role="AX2Wp" to="tpck:fKAQMTA" resolve="integer" />
     </node>
   </node>
-  <node concept="1TIwiD" id="lqDNwvnvZv">
-    <property role="TrG5h" value="InferredAttribute" />
-    <property role="3GE5qa" value="definition.meta" />
-    <property role="EcuMT" value="385804577579859935" />
-    <property role="R4oN_" value="an inferred node attribute" />
-    <ref role="1TJDcQ" to="tpck:2ULFgo8_XDk" resolve="NodeAttribute" />
-    <node concept="1TJgyj" id="lqDNwvnvZG" role="1TKVEi">
-      <property role="20lmBu" value="fLJjDmT/aggregation" />
-      <property role="20kJfa" value="substitutions" />
-      <property role="20lbJX" value="fLJekj6/_1__n" />
-      <property role="IQ2ns" value="385804577579859948" />
-      <ref role="20lvS9" node="lqDNwvnvYQ" resolve="InferredSubstitution" />
-    </node>
-    <node concept="M6xJ_" id="lqDNwvnvZw" role="lGtFl">
-      <property role="Hh88m" value="inferred" />
-      <node concept="trNpa" id="5pSqQr$RAFq" role="EQaZv">
-        <ref role="trN6q" to="w1hl:1xEzHAktP2Q" resolve="TaggedType" />
-      </node>
-    </node>
-  </node>
-  <node concept="1TIwiD" id="lqDNwvnvYQ">
-    <property role="TrG5h" value="InferredSubstitution" />
-    <property role="3GE5qa" value="definition.meta" />
-    <property role="EcuMT" value="385804577579859894" />
-    <property role="R4oN_" value="an inferred substituion" />
-    <ref role="1TJDcQ" to="tpck:gw2VY9q" resolve="BaseConcept" />
-    <node concept="1TJgyj" id="lqDNwvnvZo" role="1TKVEi">
-      <property role="20kJfa" value="metaUnit" />
-      <property role="20lbJX" value="fLJekj4/_1" />
-      <property role="IQ2ns" value="385804577579859928" />
-      <ref role="20lvS9" node="7eOyx9raabt" resolve="MetaUnit" />
-    </node>
-    <node concept="1TJgyj" id="lqDNwvnvZk" role="1TKVEi">
-      <property role="20lmBu" value="fLJjDmT/aggregation" />
-      <property role="20kJfa" value="realUnit" />
-      <property role="IQ2ns" value="385804577579859924" />
-      <ref role="20lvS9" node="7eOyx9r3k4t" resolve="UnitSpecification" />
-    </node>
-  </node>
-  <node concept="1TIwiD" id="7eOyx9raabt">
-    <property role="TrG5h" value="MetaUnit" />
-    <property role="3GE5qa" value="definition.meta" />
-    <property role="EcuMT" value="8337440621613064925" />
-    <property role="R4oN_" value="a meta unit" />
-    <ref role="1TJDcQ" to="tpck:gw2VY9q" resolve="BaseConcept" />
-    <node concept="PrWs8" id="2Ux6GHgTOwT" role="PzmwI">
-      <ref role="PrY4T" node="7eOyx9r3k3e" resolve="IUnit" />
-    </node>
-  </node>
   <node concept="1TIwiD" id="yGiRIEU5vF">
     <property role="3GE5qa" value="conversion" />
     <property role="TrG5h" value="StripUnitExpression" />