diff --git a/src/reducers/selectedMetadata.js b/src/reducers/selectedMetadata.js
deleted file mode 100644
index b165fd1e..00000000
--- a/src/reducers/selectedMetadata.js
+++ /dev/null
@@ -1,66 +0,0 @@
-import uri from "urijs";
-import _ from "lodash";
-
-/************************************************************************
-*************************************************************************
-1. This is state that will be stored in the URL query params.
-1a. It is reasonably important it be kept in the same place,
-because if initial load or back button etc, we'll hear about that
-and manually reconstruct the state from the url, overriding whatever
-we had. We could of course listen for the "url changed" type in another
-reducer, if this gets messy.
-1b. The data structures used here are constrained as well, as urijs
-needs to be able to parse them, if arrays: https://hackernoon.com/redux-patterns-add-edit-remove-objects-in-an-array-6ee70cab2456
-*************************************************************************
-************************************************************************/
-
-const selectedMetadata = (
-  state = {},
-  action
-) => {
-  switch (action.type) {
-    case "url changed": {
-      const {url} = action;
-      const parsed = uri.parseQuery(window.location.search);
-      // console.log("onURLchange sees: ", state, parsed)
-      return state;
-    }
-    case "categorical metadata filter selected success": {
-      if (!state[action.metadataField]) { /* we don't have the field, which means this is a simple insertion */
-        /* {} becomes {Location: ["Tumor"]} */
-        return Object.assign({}, state, {[action.metadataField]: [action.value]});
-      } else { /* we do have the field, so we need to push to a copy of the array */
-        const updatedField = state[action.metadataField].slice()
-        updatedField.push(action.value)
-        return Object.assign({}, state, {
-          /* {Location: ["Tumor"]} becomes {Location: ["Tumor", "Periphery"]} */
-          [action.metadataField]: updatedField
-        })
-      }
-    }
-    /*
-      Seperate because it's flatter. We know in the display logic whether or not
-      this the category button is selected when it's clicked (it's bold, etc),
-      so we can fire a different action to save us some nesting logic here
-    */
-    case "categorical metadata filter deselected success": {
-      /* remove the value the user just selected from the appropriate array */
-      let updatedField = _.without(state[action.metadataField], action.value);
-      /* if the array now looks like this {Location: []} */
-      if (updatedField.length === 0) {
-        return _.omit(state, action.metadataField) /* new state without Location property*/
-      } else {
-        return Object.assign({}, state, {
-          /* {Location: ["Tumor", "Periphery"]} becomes {Location: ["Tumor"]} */
-          [action.metadataField]: updatedField
-        })
-      }
-    }
-    default:
-      return state;
-  }
-
-  return state;
-}
-
-export default selectedMetadata;