Revert "Network settings: Add tooltip to eye icon-button"

This reverts commit f4914fbf.

Reason for revert: The paper-tooltip overflows outside of modal dialog boxes and results in unwanted horizontal scrollbars. see https://crbug.com/1055266. This fix should implement the tooltip in such a way that fits correctly inside the container.

Original change's description:
> Network settings: Add tooltip to eye icon-button
>
>
> Bug: 873114
> Change-Id: I05cef0d2a7e53c1bc965764e2b83aefd502753cf
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1993828
> Reviewed-by: Demetrios Papadopoulos <dpapad@chromium.org>
> Commit-Queue: Roman Aleksandrov <raleksandrov@google.com>
> Cr-Commit-Position: refs/heads/master@{#732662}

TBR=dpapad@chromium.org,raleksandrov@google.com,johntlee@chromium.org

# Not skipping CQ checks because original CL landed > 1 day ago.

Bug: 873114, 1055266
Change-Id: I0b7561abaf41a597556cc2e0e8d0481101eeab10
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2086351
Commit-Queue: Azeem Arshad <azeemarshad@chromium.org>
Reviewed-by: Azeem Arshad <azeemarshad@chromium.org>
Cr-Commit-Position: refs/heads/master@{#746621}

ui/webui/resources/cr_components/chromeos/network/network_password_input.html

@@ -6,7 +6,6 @@
 <link rel="import" href="chrome://resources/cr_elements/policy/cr_policy_network_indicator_mojo.html">
 <link rel="import" href="chrome://resources/cr_elements/shared_vars_css.html">
 <link rel="import" href="chrome://resources/html/i18n_behavior.html">
-<link rel="import" href="chrome://resources/polymer/v1_0/paper-tooltip/paper-tooltip.html">
 <link rel="import" href="network_config_element_behavior.html">
 <link rel="import" href="network_shared_css.html">
 
@@ -23,13 +22,6 @@
         flex: 1;
       }
 
-      paper-tooltip {
-        --paper-tooltip: {
-          @apply --cr-tooltip;
-          min-width: 0;
-        };
-      }
-
       cr-policy-network-indicator-mojo {
         --cr-tooltip-icon-margin-start: var(--cr-controlled-by-spacing);
       }
@@ -48,12 +40,8 @@
         <cr-icon-button id="icon" slot="suffix"
             class$="[[getIconClass_(showPassword)]]"
             on-click="onShowPasswordTap_"
-            aria-describedby="tooltip">
+            title="[[getShowPasswordTitle_(showPassword)]]">
         </cr-icon-button>
-        <paper-tooltip id="tooltip" for="icon" position="top"
-            fit-to-visible-bounds role="tooltip">
-          [[getShowPasswordTitle_(showPassword)]]
-        </paper-tooltip>
       </template>
       <template is="dom-if" if="[[showPolicyIndicator_]]" restamp>
         <cr-policy-network-indicator-mojo