Remove default-text-color

Redundant, and replaced with primary-text-color.

Change-Id: I75ba49f6789b962ffd2c33e7cd1e04c4d6779326

polygerrit-ui/app/elements/admin/gr-group-members/gr-group-members.html

diff --git a/polygerrit-ui/app/elements/admin/gr-group-members/gr-group-members.html b/polygerrit-ui/app/elements/admin/gr-group-members/gr-group-members.html
index 23d617f..e019e05 100644
--- a/polygerrit-ui/app/elements/admin/gr-group-members/gr-group-members.html
+++ b/polygerrit-ui/app/elements/admin/gr-group-members/gr-group-members.html
@@ -57,7 +57,7 @@
         }
       }
       a {
-        color: var(--default-text-color);
+        color: var(--primary-text-color);
         text-decoration: none;
       }
       a:hover {

polygerrit-ui/app/elements/change-list/gr-change-list-item/gr-change-list-item.html

diff --git a/polygerrit-ui/app/elements/change-list/gr-change-list-item/gr-change-list-item.html b/polygerrit-ui/app/elements/change-list/gr-change-list-item/gr-change-list-item.html
index 9ec1f2d..d7eac85 100644
--- a/polygerrit-ui/app/elements/change-list/gr-change-list-item/gr-change-list-item.html
+++ b/polygerrit-ui/app/elements/change-list/gr-change-list-item/gr-change-list-item.html
@@ -86,7 +86,7 @@
         padding: .4rem .6rem;
       }
       a {
-        color: var(--default-text-color);
+        color: var(--primary-text-color);
         cursor: pointer;
         display: inline-block;
         text-decoration: none;

polygerrit-ui/app/elements/change/gr-message/gr-message.html

diff --git a/polygerrit-ui/app/elements/change/gr-message/gr-message.html b/polygerrit-ui/app/elements/change/gr-message/gr-message.html
index fea01ca..8acf96f 100644
--- a/polygerrit-ui/app/elements/change/gr-message/gr-message.html
+++ b/polygerrit-ui/app/elements/change/gr-message/gr-message.html
@@ -119,7 +119,7 @@
         position: static;
       }
       .collapsed .author {
-        color: var(--default-text-color);
+        color: var(--primary-text-color);
         margin-right: .4em;
       }
       .expanded .author {

polygerrit-ui/app/elements/shared/gr-account-link/gr-account-link.html

diff --git a/polygerrit-ui/app/elements/shared/gr-account-link/gr-account-link.html b/polygerrit-ui/app/elements/shared/gr-account-link/gr-account-link.html
index bea8d27..34b0de6 100644
--- a/polygerrit-ui/app/elements/shared/gr-account-link/gr-account-link.html
+++ b/polygerrit-ui/app/elements/shared/gr-account-link/gr-account-link.html
@@ -28,7 +28,7 @@
         display: inline-block;
       }
       a {
-        color: var(--default-text-color);
+        color: var(--primary-text-color);
         text-decoration: none;
       }
       gr-account-label {

polygerrit-ui/app/elements/shared/gr-list-view/gr-list-view.html

diff --git a/polygerrit-ui/app/elements/shared/gr-list-view/gr-list-view.html b/polygerrit-ui/app/elements/shared/gr-list-view/gr-list-view.html
index d295770..71999acaf 100644
--- a/polygerrit-ui/app/elements/shared/gr-list-view/gr-list-view.html
+++ b/polygerrit-ui/app/elements/shared/gr-list-view/gr-list-view.html
@@ -37,7 +37,7 @@
         display: none;
       }
       a {
-        color: var(--default-text-color);
+        color: var(--primary-text-color);
         text-decoration: none;
       }
       a:hover {

polygerrit-ui/app/styles/app-theme.html

diff --git a/polygerrit-ui/app/styles/app-theme.html b/polygerrit-ui/app/styles/app-theme.html
index ce9f8a1..354f223 100644
--- a/polygerrit-ui/app/styles/app-theme.html
+++ b/polygerrit-ui/app/styles/app-theme.html
@@ -28,7 +28,6 @@
   /* Following are not part of plugin API. */
   --selection-background-color: #f1f5fb;
   --selection-border-color: #cadcfa;
-  --default-text-color: #000;
   --view-background-color: #fff;
   --default-horizontal-margin: 1rem;
   --font-family: 'Roboto', -apple-system, BlinkMacSystemFont, 'Segoe UI', Helvetica, Arial, sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji', 'Segoe UI Symbol';

polygerrit-ui/app/styles/gr-table-styles.html

diff --git a/polygerrit-ui/app/styles/gr-table-styles.html b/polygerrit-ui/app/styles/gr-table-styles.html
index 9964d02..b187c3b 100644
--- a/polygerrit-ui/app/styles/gr-table-styles.html
+++ b/polygerrit-ui/app/styles/gr-table-styles.html
@@ -43,7 +43,7 @@
         background-color: #eee;
       }
       .genericList a {
-        color: var(--default-text-color);
+        color: var(--primary-text-color);
         text-decoration: none;
       }
       .genericList a:hover {