py-xlsx2csv: Simplify by removing unneeded lines

Remove real_name variable and don't set homepage, master_sites,
worksrcdir or distfiles; the defaults from the python portgroup work
fine.

python/py-xlsx2csv/Portfile

@@ -4,7 +4,6 @@ PortSystem          1.0
 PortGroup           python 1.0
 
 name                py-xlsx2csv
-set real_name       xlsx2csv
 version             0.7.7
 platforms           darwin
 supported_archs     noarch
@@ -16,12 +15,6 @@ description         xlsx to csv converter
 long_description    Converts xslx files to csv format.\
                     Handles large XLSX files. Fast and easy to use.
 
-homepage            https://pypi.python.org/pypi/${real_name}
-master_sites        pypi:x/${real_name}
-
-worksrcdir          ${real_name}-${version}
-distfiles           ${real_name}-${version}${extract.suffix}
-
 checksums           rmd160  5391403df70ec0877ac9eaf7a8798feb8f7c1e1f \
                     sha256  844a79ec29278ae05cb60b0056a5b839c034d45875b6e672fcb1845fed7c7127 \
                     size    237132