UI - clean some warnings

Author: urirot

src/client/src/pages/Admin.js

@@ -29,9 +29,6 @@ const styles = theme => ({
     }
 });
 
-
-const executing = "executing"
-
 class Admin extends Component {
     constructor(props) {
         super(props);

src/client/src/pages/DataView360/components/Adoptions.js

@@ -35,9 +35,6 @@ const StyledTableRow = withStyles((theme) => ({
 const PET_COUNT = 3;
 
 class Adoptions extends Component {
-    constructor(props) {
-        super(props);
-    }
 
     getLatestPets(petList) {
         let retVal;
@@ -79,7 +76,7 @@ class Adoptions extends Component {
                             {_.map(latestPets, (adoptionInfo, index) => {
 
                                 const photoLink = _.get(adoptionInfo, "Photos.[0]");
-                                const photo = <img src={photoLink} style={{"maxWidth": "100px"}}/>
+                                const photo = <img src={photoLink} alt="animal" style={{"maxWidth": "100px"}}/>
 
                                 return <StyledTableRow key={index}>
                                     <TableCell align="center">{adoptionInfo["Name"]}</TableCell>

src/client/src/pages/DataView360/components/ContactInfo.js

@@ -17,10 +17,6 @@ const StyledContact = withStyles((theme) => ({
 
 
 class ContactInfo extends Component {
-    constructor(props) {
-        super(props);
-    }
-
 
     populate_participant_with_data_source(participant, participantData) {
         return {

src/client/src/pages/DataView360/components/SearchBar.js

@@ -66,12 +66,10 @@ class SearchBar extends Component {
     }
 
     selectParticipant() {
-        let participants;
-
         if (this.state.participantList != null) {
             const participantList = this.state.participantList.slice(0, LIST_LIMIT);
 
-            participants = _.map(participantList, person => {
+            _.map(participantList, person => {
                 return (<MenuItem value={person.contact_id} key={person.contact_id}>
                     {person.name}
                     {" "}