Firmware: Remove .tar references

Remove the accept prop in the file upload component on the firmware page.
Remove the helper text that indicates to the user to upload a .tar file.

Signed-off-by: Maciej Magdziarz <maciejx.magdziarz@intel.com>
Change-Id: I781bd316ce591809b35ae5990d0f7b02af288e41
diff --git a/src/locales/en-US.json b/src/locales/en-US.json
index ef4a417..d525bc4 100644
--- a/src/locales/en-US.json
+++ b/src/locales/en-US.json
@@ -336,7 +336,6 @@
         "fileAddress": "File address",
         "fileSource": "File source",
         "imageFile": "Image file",
-        "imageFileHelperText": "Only .tar files accepted",
         "startUpdate": "Start update",
         "tftpServer": "TFTP server",
         "workstation": "Workstation"
diff --git a/src/views/Configuration/Firmware/FirmwareFormUpdate.vue b/src/views/Configuration/Firmware/FirmwareFormUpdate.vue
index 702352f..cae3571 100644
--- a/src/views/Configuration/Firmware/FirmwareFormUpdate.vue
+++ b/src/views/Configuration/Firmware/FirmwareFormUpdate.vue
@@ -26,7 +26,6 @@
             </b-form-text>
             <form-file
               id="image-file"
-              accept=".tar"
               :disabled="isPageDisabled"
               :state="getValidationState($v.file)"
               aria-describedby="image-file-help-block"