remove fixture file for text extraction (and move them to separate gem)

spec/fixtures/files/spreadsheet.csv

@@ -1,2 +0,0 @@
-lorem,,,
-ipsum,fulltext,,find me!

spec/fixtures/files/text.rtf

@@ -1,22 +0,0 @@
-{\rtf1\ansi\deff3\adeflang1025
-{\fonttbl{\f0\froman\fprq2\fcharset0 Times New Roman;}{\f1\froman\fprq2\fcharset2 Symbol;}{\f2\fswiss\fprq2\fcharset0 Arial;}{\f3\froman\fprq2\fcharset0 Liberation Serif{\*\falt Times New Roman};}{\f4\fswiss\fprq2\fcharset0 Liberation Sans{\*\falt Arial};}{\f5\fmodern\fprq1\fcharset0 Liberation Mono{\*\falt Courier New};}{\f6\fnil\fprq2\fcharset0 Droid Sans Fallback;}{\f7\fmodern\fprq1\fcharset0 Courier New;}{\f8\fnil\fprq2\fcharset0 FreeSans;}{\f9\fswiss\fprq0\fcharset128 FreeSans;}}
-{\colortbl;\red0\green0\blue0;\red128\green128\blue128;}
-{\stylesheet{\s0\snext0\nowidctlpar{\*\hyphen2\hyphlead2\hyphtrail2\hyphmax0}\cf0\dbch\af6\langfe2052\dbch\af8\afs24\alang1081\loch\f3\fs24\lang1033 Normal;}
-{\s15\sbasedon0\snext16\sb240\sa120\keepn\dbch\af6\dbch\af8\afs28\loch\f4\fs28 Heading;}
-{\s16\sbasedon0\snext16\sl288\slmult1\sb0\sa140 Text Body;}
-{\s17\sbasedon16\snext17\sl288\slmult1\sb0\sa140\dbch\af9 List;}
-{\s18\sbasedon0\snext18\sb120\sa120\noline\i\dbch\af9\afs24\ai\fs24 Caption;}
-{\s19\sbasedon0\snext19\noline\dbch\af9 Index;}
-{\s20\sbasedon0\snext20\sb0\sa0\dbch\af7\dbch\af5\afs20\loch\f5\fs20 Preformatted Text;}
-}{\info{\creatim\yr0\mo0\dy0\hr0\min0}{\revtim\yr2017\mo5\dy17\hr8\min5}{\printim\yr0\mo0\dy0\hr0\min0}{\comment LibreOffice}{\vern67306242}}\deftab709
-\viewscale100
-{\*\pgdsctbl
-{\pgdsc0\pgdscuse451\pgwsxn11906\pghsxn16838\marglsxn1134\margrsxn1134\margtsxn1134\margbsxn1134\pgdscnxt0 Default Style;}}
-\formshade\paperh16838\paperw11906\margl1134\margr1134\margt1134\margb1134\sectd\sbknone\sectunlocked1\pgndec\pgwsxn11906\pghsxn16838\marglsxn1134\margrsxn1134\margtsxn1134\margbsxn1134\ftnbj\ftnstart1\ftnrstcont\ftnnar\aenddoc\aftnrstcont\aftnstart1\aftnnrlc
-{\*\ftnsep\chftnsep}\pgndec\pard\plain \s20\sb0\sa0\dbch\af7\dbch\af5\afs20\loch\f5\fs20{\rtlch \ltrch\loch
-lorem ipsum }{\i0\b\ai0\ab\rtlch \ltrch\loch
-fulltext}{\rtlch \ltrch\loch
- }{\ul\ulc0\rtlch \ltrch\loch
-find}{\rtlch \ltrch\loch
- me!}
-\par }

spec/fixtures/files/text.txt

@@ -1 +0,0 @@
-lorem ipsum fulltext find me!