removed unused styles

sd-card/html/edit_explain_0.html

@@ -7,9 +7,6 @@
 <meta name="viewport" content="width=device-width, initial-scale=1.0">
 
 <style>
-.h_iframe iframe {width:995px;height:605px;}
-.h_iframe {width:995px;height:605px;}
-
 h1 {font-size: 2em; margin-block-end: 0.3em;}
 h2 {font-size: 1.5em;margin-block-start: 0.3em;}
 h3 {font-size: 1.2em;}

sd-card/html/edit_explain_6.html

@@ -7,9 +7,6 @@
 <meta name="viewport" content="width=device-width, initial-scale=1.0">
 
 <style>
-.h_iframe iframe {width:995px;height:605px;}
-.h_iframe {width:995px;height:605px;}
-
 h1 {font-size: 2em; margin-block-end: 0.3em;}
 h2 {font-size: 1.5em;margin-block-start: 0.3em;}
 h3 {font-size: 1.2em;}

sd-card/html/explain_0.html

@@ -7,9 +7,6 @@
 <meta name="viewport" content="width=device-width, initial-scale=1.0">
 
 <style>
-.h_iframe iframe {width:995px;height:605px;}
-.h_iframe {width:995px;height:605px;}
-
 h1 {font-size: 2em; margin-block-end: 0.3em;}
 h2 {font-size: 1.5em;margin-block-start: 0.3em;}
 h3 {font-size: 1.2em;}

sd-card/html/explain_1.html

@@ -7,8 +7,6 @@
 <meta name="viewport" content="width=device-width, initial-scale=1.0">
 
 <style>
-.h_iframe iframe {width:995px;height:605px;}
-.h_iframe {width:995px;height:605px;}
 
 h1 {font-size: 2em; margin-block-end: 0.3em;}
 h2 {font-size: 1.5em;margin-block-start: 0.3em;}

sd-card/html/explain_2.html

@@ -7,9 +7,6 @@
 <meta name="viewport" content="width=device-width, initial-scale=1.0">
 
 <style>
-.h_iframe iframe {width:995px;height:605px;}
-.h_iframe {width:995px;height:605px;}
-
 h1 {font-size: 2em; margin-block-end: 0.3em;}
 h2 {font-size: 1.5em;margin-block-start: 0.3em;}
 h3 {font-size: 1.2em;}

sd-card/html/explain_3.html

@@ -7,8 +7,6 @@
 <meta name="viewport" content="width=device-width, initial-scale=1.0">
 
 <style>
-.h_iframe iframe {width:995px;height:605px;}
-.h_iframe {width:995px;height:605px;}
 
 h1 {font-size: 2em; margin-block-end: 0.3em;}
 h2 {font-size: 1.5em;margin-block-start: 0.3em;}

sd-card/html/explain_4.html

@@ -7,9 +7,6 @@
 <meta name="viewport" content="width=device-width, initial-scale=1.0">
 
 <style>
-.h_iframe iframe {width:995px;height:605px;}
-.h_iframe {width:995px;height:605px;}
-
 h1 {font-size: 2em; margin-block-end: 0.3em;}
 h2 {font-size: 1.5em;margin-block-start: 0.3em;}
 h3 {font-size: 1.2em;}

sd-card/html/explain_5.html

@@ -7,9 +7,6 @@
 <meta name="viewport" content="width=device-width, initial-scale=1.0">
 
 <style>
-.h_iframe iframe {width:995px;height:605px;}
-.h_iframe {width:995px;height:605px;}
-
 h1 {font-size: 2em; margin-block-end: 0.3em;}
 h2 {font-size: 1.5em;margin-block-start: 0.3em;}
 h3 {font-size: 1.2em;}

sd-card/html/explain_6.html

@@ -7,8 +7,6 @@
 <meta name="viewport" content="width=device-width, initial-scale=1.0">
 
 <style>
-.h_iframe iframe {width:995px;height:605px;}
-.h_iframe {width:995px;height:605px;}
 
 h1 {font-size: 2em; margin-block-end: 0.3em;}
 h2 {font-size: 1.5em;margin-block-start: 0.3em;}