drop redundant quotes

DESCRIPTION

@@ -1,7 +1,7 @@
 Package: cdcfluview
 Type: Package
 Encoding: UTF-8
-Title: Retrieve 'U.S'. Flu Season Data from the 'CDC' 'FluView' Portal
+Title: Retrieve U.S. Flu Season Data from the CDC 'FluView' Portal
 Version: 0.8.0
 Date: 2018-11-23
 Authors@R: c(
@@ -15,12 +15,12 @@ Authors@R: c(
            comment = c(ORCID = "0000-0002-1791-9449"))
   )
 Maintainer: Bob Rudis <bob@rud.is>
-Description: The 'U.S.' Centers for Disease Control ('CDC') maintains a portal
+Description: The U.S. Centers for Disease Control and Prevention (CDC) maintain
-    <http://gis.cdc.gov/grasp/fluview/fluportaldashboard.html> for
+    a portal <http://gis.cdc.gov/grasp/fluview/fluportaldashboard.html> for
     accessing state, regional and national influenza statistics as well as
-    Mortality Surveillance Data. The web interface makes it difficult and 
+    mortality surveillance data. The web interface makes it difficult and
     time-consuming to select and retrieve influenza data. Tools are provided 
-    to access the data provided by the portal's underlying 'API'.
+    to access the data provided by the portal's underlying API.
 URL: https://github.com/hrbrmstr/cdcfluview
 BugReports: https://github.com/hrbrmstr/cdcfluview/issues
 License: MIT + file LICENSE